Rabbi Isaac taught that when a king administers an oath to his legions, he does so with a sword, implying that whoever transgressed the oath would have the sword pass over his neck. Similarly, at Sinai, as reports, "Moses took half of the blood" (thus adjuring them with the blood). The Midrash asked how Moses knew how much was half of the blood. Rabbi Judah bar Ila'i taught that the blood divided itself into halves on its own. Rabbi Nathan said that its appearance changed; half of it turned black, and half remained red. Bar Kappara told that an angel in the likeness of Moses came down and divided it. Rabbi Isaac taught that a Heavenly Voice came from Mount Horeb, saying that this much is half of the blood. Rabbi Ishmael taught in a Baraita that Moses was expert in the regulations relating to blood, and by means of that knowledge divided it. goes on to say, "And he put it in basins (, "aganot")." Rav Huna said in the name of Rabbi Avin that writes the word in a form that might be read "aganat" ("basin," singular) indicating that neither basin was larger than the other. Moses asked God what to do with God's portion. God told Moses to sprinkle it on the people. ( reports, "And Moses took the blood, and sprinkled it on the people.") Moses asked what he should do with the Israelites' portion. God said to sprinkle it on the altar, as says, "And half of the blood he dashed against the altar."