Exodus 34:20

20 Thou shalt again-buy with a sheep the first engendered of an ass, else if thou givest not [the] price therefore, it shall be slain. Thou shalt again-buy the first begotten of thy sons; neither thou shalt appear void in my sight. (Thou shalt buy back the first-born of a donkey with a sheep, but if thou wilt not buy it back, it shall be killed. Thou shalt buy back the first-born of thy sons; thou shalt not appear empty-handed before me.)

Exodus 34:20 Meaning and Commentary

Exodus 34:20

Every firstling of an ass thou shalt redeem
This goes along with the former, (See Gill on Exodus 13:13):

and none shall appear before me empty;
at the grand festivals, the passover, pentecost, and tabernacles, (See Gill on Exodus 13:15).

Exodus 34:20 In-Context

18 Thou shalt keep the solemnity of therf loaves; seven days thou shalt eat therf loaves, as I commanded to thee, in the time of the month of new fruits; for in the month of ver time thou wentest out of Egypt. (Thou shalt keep the Feast of Unleavened Bread; for seven days thou shalt eat unleavened bread, as I commanded to thee, at the time of the month of Abib; for in the month of Abib thou wentest out of Egypt.)

19 All thing of male kind that (first) openeth the womb shall be mine, of all living beasts, as well of oxen, as of sheep, it shall be mine. (All the males that first openeth the womb shall be mine, yea, of people, and of all living beasts, of oxen, as well as of sheep, they all be mine.)

20 Thou shalt again-buy with a sheep the first engendered of an ass, else if thou givest not [the] price therefore, it shall be slain. Thou shalt again-buy the first begotten of thy sons; neither thou shalt appear void in my sight. (Thou shalt buy back the first-born of a donkey with a sheep, but if thou wilt not buy it back, it shall be killed. Thou shalt buy back the first-born of thy sons; thou shalt not appear empty-handed before me.)

21 Six days thou shalt work, in the seventh day thou shalt cease to ear and to reap. (For six days thou shalt work, but on the seventh day thou shalt cease to plow and to harvest.)

22 Thou shalt make to thee the solemnity of weeks, in the first things of fruits of thy ripe corn of wheat, and the solemnity when all things be gathered into barns, when the time of the year cometh again. (Thou shalt keep the Feast of Weeks, with the first fruits of thy wheat harvest, and also the Feast of Ingathering, when all things be gathered into the barns, when that time of the year cometh again. )