Moses
Exodus 12:51ESV·traditional attribution

And on that very day the LORD brought the people of Israel out of the land of Egypt by their hosts.

Matthew Henry Presbyterian @wholebiblehenry

Some further precepts are here given concerning the passover, as it should be observed in times to come. I. All the congregation of Israel must keep it, Exo 12:47. All that share in God's mercies should join in thankful praises for them. Though it was observed in families apart, yet it is looked upon as the act of the whole congregation; for the smaller communities constituted the greater.

Commenting on Exodus 12:43-51

Jamieson-Fausset-Brown Reformed @jfbcommentary

UNLEAVENED BREAD. (Exo. 12:15-51) Seven days shall ye eat unleavened bread, &c.--This was to commemorate another circumstance in the departure of the Israelites, who were urged to leave so hurriedly that their dough was unleavened (Exo 12:39), and they had to eat unleavened cakes (Deu 16:3).

Commenting on Exodus 12:15-51

Adam Clarke Methodist @methodicalclarke

By their armies - צבאתם tsibotham, from צבא tsaba, to assemble, meet together, in an orderly or regulated manner, and hence to war, to act together as troops in battle; whence צבאות tsebaoth, troops, armies, hosts. It is from this that the Divine Being calls himself יהוה צבאות Yehovah tsebaoth, the Lord Of Hosts or armies, because the Israelites were brought out of Egypt under...