The interpretation timeline
2 Samuel 11:4 Douay-Rheims

And David sent messengers, and took her, and she came in to him, and he slept with her: and presently she was purified from her uncleanness:

A.D. 407 – 1871 6 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“It would be better for the sun to be extinguished than for David's words to be forgotten and not transmitted to others. He fell into adultery and envy. For he saw, he says, a beautiful woman bathing and became enamored of her; and later he succeeded in doing all that he fancied.And the prophet was found in adultery, the pearl in mud. However, he did not yet understand that he had sinned, the passion ravaged him to such a great extent. Because, when the charioteer gets drunk, the chariot moves in an irregular, disorderly manner. What the charioteer is to the chariot, the soul is to the body. If the soul becomes darkened, the body rolls in mud. As long as the charioteer stands firm, the chariot drives smoothly. However, when he becomes exhausted and is unable to hold the reins firmly, you see this very chariot in terrible danger. This exact same thing happens to human beings. As long as the soul is sober and vigilant, this very body remains in purity. However, when the soul is darkened, this very body rolls in mud and in lusts. Therefore, what did David do? He committed adultery; yet neither was he aware nor was he censured by anyone. This occurred in his most venerable years, so you may learn that, if you are indolent, not even old age benefits you, nor, if you are earnest, can youthful years seriously harm you. Behavior does not depend on age but on the direction of the will.… So you may learn that the affairs of prudence rely upon the will and do not depend on age, just remember that David was found in his venerable years falling into adultery and committing murder; and he reached such a pathetic state that he was unaware that he had sinned, because his mind, which was the charioteer, was drunk from debauchery.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“From her uncleanliness. From her menstrual impurity.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And David sent messengers,.... To invite her to his palace: and took her; not by force, but through persuasion: and she came in unto him; into the apartment where he was: and he lay with her; she consenting to it, being prevailed upon, and drawn into it through the greatness and goodness of the man, which might make the sin appear the lesser to her. This is recorded to show what the best of men are, when left to themselves; how strong and prevalent corrupt nature is in regenerate persons, when grace is not in exercise; what need the saints stand in of fresh supplies of grace, to keep them from falling; what caution is necessary to everyone that stands, lest he fall; and that it becomes us to abstain from all appearance of sin, and whatever leads unto it, and to watch and pray that we enter not into temptation; and such a record as this is an argument for the integrity of the Scriptures, that they conceal not the faults of the greatest favourites mentioned in them, as well as it serves to prevent despair in truly penitent backsliders: for she was purified from her uncleanness; this clause is added in a parenthesis, partly to show the reason of her washing herself, which was not for health and pleasure, and to cool herself in a hot day, but to purify herself from her menstruous pollution, according to the law in Lev 15:19; the term of her separation being expired; and partly to give a reason why she the more easily consented, and he was the more eager to enjoy her; and in this he sinned, not that he did not lie with an unclean person; but, then, as some observe, he did that which was much worse, he committed adultery; also this may be added to observe, that she was the more apt for conception, as Ben Gersom notes, and to account for the quickness of it, with which the philosopher (i) agrees: and she returned unto her house; whether that evening, or next morning, or how long she stayed, is not said. (i) Aristot. Hist. Animal. l. 7. c. 2.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“And she came in unto him - We hear nothing of her reluctance, and there is no evidence that she was taken by force.”
1849
A.D.
1774–1849
“Purified. Literally, “sanctified.” Hebrew and Septuagint, “for she was, ” &c. (Haydock) — Hoc ideo additum ne miraremur illico eam concepisse. (Grotius; Aristotle, Anim. vii. 20. — Women were obliged to bathe after such actions, Leviticus xv. 18.”
1871
A.D.
1871
“David sent messengers, and took her--The despotic kings of the East, when they take a fancy for a woman, send an officer to the house were she lives, who announces it to be the royal pleasure she should remove to the palace. An apartment is there assigned to her; and if she is made queen, the monarch orders the announcement to be made that he has made choice of her to be queen. Many instances in modern Oriental history show the ease and despatch with which such secondary marriages are contracted, and a new beauty added to the royal seraglio. But David had to make a promise, or rather an express stipulation, to Bath-sheba, before she complied with the royal will (Kg1 1:13, Kg1 1:15, Kg1 1:17, Kg1 1:28); for in addition to her transcendent beauty, she appears to have been a woman of superior talents and address in obtaining the object of her ambition; in her securing that her son should succeed on the throne; in her promptitude to give notice of her pregnancy; in her activity in defeating Adonijah's natural expectation of succeeding to the crown; in her dignity as the king's mother--in all this we see very strong indications of the ascendency she gained and maintained over David, who, perhaps, had ample leisure and opportunity to discover the punishment of this unhappy connection in more ways than one [TAYLOR, Calmet].”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.