The interpretation timeline
2 Samuel 12:8 Douay-Rheims

And gave thee thy master’s house and thy master’s wives into thy bosom, and gave thee the house of Israel and Juda: and if these things be little, I shall add far greater things unto thee.

A.D. 407 – 1871 6 witnesses

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“Therefore, Nathan went to David and wove a dramatic act for judgment. And what did he say? "My king, I want your judgment. There was a certain rich man and a certain poor one. The rich person possessed herds of cattle and many other flocks; and the poor one had one ewe that drank from his glass, ate from his table and slept in his embrace." Here Nathan revealed the genuine bond between a husband and wife. "When a certain stranger arrived, the rich man desired to keep his own animals, and he took the poor man's ewe and slaughtered her." Here, do you see how Nathan wove the dramatic act, mysteriously concealing the weapon in the glands of David's throat? Then what did the king say? Thinking that he had to pass judgment against someone else, he decided most severely. For such are human beings. When it concerns other people, they gladly and abruptly render decisions and publicize them. And what did David say? "As the Lord lives, the man who did this thing is worthy of death. And he shall restore the lamb fourfold." Therefore, what did Nathan reply? He did not allow the wound to be relieved for many hours; rather, he quickly stripped it naked and sharply embedded the knife deeply into it, so as not to rob it of the painful sensation. "You are the man, my king." What did the king say? "I have sinned against the Lord." He did not say, "Who are you who censures me? Who sent you to speak with such boldness? With what daring did you prevail?" He did not say anything of the sort; rather, he perceived the sin. And what did he say? "I have sinned against the Lord." Therefore, what did Nathan say to him? "And the Lord remitted your sin." You condemned yourself; I [God] remit your sentence. You confessed prudently; you annulled the sin. You appropriated a condemnatory decision against yourself; I repealed the sentence. Can you see that what is written in Scripture was fulfilled: "Be the first one to tell of your transgression so you may be justified" How toilsome is it to be the first one to declare the sin?”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“Your master's woman. Michal, the daughter of Shaul. I will add on. I would add on for you.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Wherefore hast thou despised the commandment of the Lord, to do evil in his sight?.... The commandment referred to is the law of God, particularly the sixth and seventh precepts of it, Exo 20:13; which David had shown no regard unto, and by his breaking them had slighted and despised them: thou hast killed Uriah the Hittite with the sword; and so had despised and broken the sixth command, Exo 20:13; for though he had not taken away his life with his own hand, he had plotted and contrived it, and had given orders to put him in such a position as would issue in it: and hast taken his wife to be thy wife; after he had defiled her, being another man's wife, and had taken such unlawful methods to make her his wife, whereby he had despised and broken both the sixth and the seventh commands, Exo 20:13, and hast slain him with the sword of the children of Ammon; though he had not put him to death with his own sword, he had done that which was as bad or worse in some respects, he had exposed him to the sword of the Ammonites, by which it was taken away; and not his only, but that of some of the Israelites also, which gave that uncircumcised people reason to triumph over the children of Israel, and even to blaspheme the God of Israel.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Thy master's wives into thy bosom - Perhaps this means no more than that he had given him absolute power over every thing possessed by Saul; and as it was the custom for the new king to succeed even to the wives and concubines, the whole harem of the deceased king, so it was in this case; and the possession of the wives was a sure proof that he had got all regal rights. But could David, as the son-in-law of Saul, take the wives of his father-in-law? However, we find delicacy was seldom consulted in these cases; and Absalom lay with his own father's wives in the most public manner, to show that he had seized on the kingdom, because the wives of the preceding belonged to the succeeding king, and to none other.”
Source
1849
A.D.
1774–1849
“Wives. We know of none that David married. But, as king, he enjoyed alone that privilege. (Grotius) (Chap. iii. 7., and xvi. 21.) — Unto thee. Hebrew, “I would have given thee such and such.” (Calmet) — Septuagint, “I will moreover give thee like unto these;” a continuation of prosperity. (Haydock) — This singular love, which God was still disposed to manifest unto David, touched his heart with peculiar force. (Salien)”
Source
1871
A.D.
1871
“I gave thee thy master's house, and thy master's wives--The phraseology means nothing more than that God in His providence had given David, as king of Israel, everything that was Saul's. The history furnishes conclusive evidence that he never actually married any of the wives of Saul. But the harem of the preceding king belongs, according to Oriental notions, as a part of the regalia to his successor.”
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.