The interpretation timeline
Exodus 24:8 Douay-Rheims

And he took the blood and sprinkled it upon the people, and he said: This is the blood of the covenant which the Lord hath made with you concerning all these words.

1105 – 1871 4 witnesses

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
ויזרק means sprinkling — he sprinkled it on the people (not he threw it against the people, as this word might imply; cf. e. g., Exodus 9:8: וזרקו משה השמימה). The Targum, however, renders it by: and he poured it (the blood) upon the altar as atonement for (על) the people, adding the words “upon the altar”, and taking על העם to denote “on behalf of the people”, i. e. he poured it out to atone for the people.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And Moses took the blood,.... The other half of the blood which was in the basins: and sprinkled it on the people; not on the whole body of the people, who could not be brought nigh enough, and were too numerous to be all sprinkled with it; though the apostle so expresses it, a part being put for the whole, Heb 9:19 either this was sprinkled on the young men that offered the sacrifices in the name of all the people; or on the seventy elders, as the heads of them, so Aben Ezra; or upon the twelve pillars, which answered to the twelve tribes, and represented them as the altar did the Lord: and said, behold the blood of the covenant, which the Lord hath made with you concerning all these words; being a ratification of the covenant on both sides, having been sprinkled both upon the altar, and upon the people. In allusion to which, the blood of Christ is sometimes called the blood of sprinkling, and which, sprinkled upon the mercy seat, calls for pardon for men; and sprinkled on their consciences, speaks peace and pardon to them, and cleanses from all sin; and sometimes the blood of the everlasting covenant, the covenant of grace made with him, by which it is ratified and confirmed; and our Lord may have regard to this rite and mode of expression in Mat 26:28.”
Source
1849
A.D.
1774–1849
“Covenant. Thus Christ confirmed the new covenant, by the effusion of his blood. (Tirinus) — This is daily renewed upon our altars for ever. (Calmet) — Our Saviour alludes to this transaction in the consecration of the chalice. (Du Hamel) — If wine alone had been substituted instead of blood, the figure would have surpassed the reality. (Isichius.) (Worthington)”
Source
1871
A.D.
1871
“Moses took the blood, and sprinkled it on the people--probably on the twelve pillars, as representing the people (also the book, Heb 9:19), and the act was accompanied by a public proclamation of its import. It was setting their seal to the covenant (compare Co1 11:25). It must have been a deeply impressive, as well as instructive scene, for it taught the Israelites that the covenant was made with them only through the sprinkling of blood--that the divine acceptance of themselves and services, was only by virtue of an atoning sacrifice, and that even the blessings of the national covenant were promised and secured to them only through grace. The ceremonial, however, had a further and higher significance, as is shown by the apostle (see as above).”
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.