Exodus 10:9

With our sons and with our daughters... for we must hold a feast. — It was customary in Egypt for children to join in festivals (Herod. ii. 60).

With our flocks and with our herds. — The family of Jacob brought numerous flocks and herds into Egypt (Genesis 47:1). These had, no doubt, increased, notwithstanding the oppression, and at the time of the Exodus must have been very numerous. The requirement to “take a lamb for an house” (Exodus 12:2) on the institution of the Passover involved the killing, on a single day, of 200,000 lambs. Even after this the flocks and herds which went out with them (Exodus 12:38) were “very much cattle.”