וַיִּשְׁחַ֖ט אֶת־הָעֹלָ֑ה וַ֠יַּמְצִאוּ בְּנֵ֨י אַהֲרֹ֤ן אֵלָיו֙ אֶת־הַדָּ֔ם וַיִּזְרְקֵ֥הוּ עַל־הַמִּזְבֵּ֖חַ סָבִֽיב׃
Il immola l’holocauste; les fils d’Aaron lui passèrent le sang, et il en arrosa le tour de l’autel.
Rashi on Leviticus
וימציאו — This signifies handing over and presenting.
Sforno on Leviticus
וימציאו, they used this opportunity to become trained in the priestly functions by assisting in their father’s personal sacrifice.