20 The firstling of an ass thou shalt redeem with a sheep: but if thou wilt not give a price for it, it shall be slain. The firstborn of thy sons thou shalt redeem: neither shalt thou appear before me empty.
Exodus 34:20 Cross References - DouayRheims
Exodus 13:10
10 Thou shalt keep this observance at the set time from days to days.
Exodus 13:13
13 The firstborn of an ass thou shalt change for a sheep: and if thou do not redeem it, thou shalt kill it. And every firstborn of men thou shalt redeem with a price.
Exodus 13:15
15 For when Pharao was hardened, and would not let us go, the Lord slew every firstborn in the land of Egypt, from the firstborn of man to the firstborn of beasts: therefore I sacrifice to the Lord all that openeth the womb of the male sex, and all the firstborn of my sons I redeem.
Exodus 23:15
15 Thou shalt keep the feast of unleavened bread. Seven days shalt thou eat unleavened bread, as I commanded thee, in the time of the month of new corn, when thou didst come forth out of Egypt: thou shalt not appear empty before me.
Numbers 3:45-51
45 Take the Levites for the firstborn of the children of Israel, and the cattle of the Levites for their cattle, and the Levites shall be mine. I am the Lord.
46 But for the price of the two hundred and seventy-three, of the firstborn of the children of Israel, that exceed the number of the Levites,
47 Thou shalt take five sicles for every bead, according to the weight of the sanctuary. A sicle hath twenty obols.
48 And thou shalt give the money to Aaron and his sons, the price of them that are above.
49 Moses therefore took the money of them that were above, and whom they had redeemed from the Levites,
50 For the firstborn of the children of Israel, one thousand three hundred and sixty-five sicles, according to the weight of the sanctuary,
51 And gave it to Aaron and his sons according to the word that the Lord had commanded him.
Numbers 18:15
15 Whatsoever is firstborn of all flesh, which they offer to the Lord, whether it be of men, or of beasts, shall belong to thee: only for the firstborn of man thou shalt take a price, and every beast that is unclean thou shalt cause to be redeemed,
Deuteronomy 16:16
16 Three times in a year shall all thy males appear before the Lord thy God in the place which he shall choose: in the feast of unleavened bread, in the feast of weeks, and in the feast of tabernacles. No one shall appear with his hands empty before the Lord:
1 Samuel 9:7-8
7 And Saul said to his servant: Behold we will go: but what shall we carry to the man of God? the bread is spent in our bags: and we have no present to make to the man of God, nor any thing at all.
8 The servant answered Saul again, and said: Behold there is found in my hand the fourth part of a sicle of silver, let us give it to the man of God, that he may tell us our way.
2 Samuel 24:24
24 And the king answered him, and said: Nay, but I will buy it of thee, at a price, and I will not offer to the Lord my God holocausts free cost. So David bought the floor, and the oxen, for fifty sicles of silver: