Exodus 34:20
But the first of the ass thou shalt buy out with a sheep, or if thou redeem him not: see thou break his neck. All the firstborn of thy sons thou must needs redeem. And see that no man appear before me empty.
Exodus 23:15
Thou shalt keep the feast of sweet bread, that thou eat unleavened bread seven days long as I commanded thee in the time appointed of the month of Abib, for in that month thou camest out of Egypt: and see that no man appear before me empty.
Deuteronomy 16:16
Three times in the year shall all your males appear before the LORD thy God in the place which he shall choose: In the feast of sweet bread, in the feast of weeks and in the feast of the tabernacles. And they shall not appear before the LORD empty:
Exodus 13:15
And when Pharaoh was loath to let us go, the LORD slew all the firstborn in the land of Egypt: as well the firstborn of men as of beasts. And therefore I sacrifice unto the LORD all the males that open the matrix, but all the firstborn of my children I must redeem.'
Exodus 13:13
And all the firstborn of the asses, thou shalt redeem with a sheep: if thou redeem him not, then break his neck. But all the firstborn among thy children shalt thou buy out.
Numbers 18:15
All that breaketh the matrix of all flesh that men bring unto the LORD, both of man and beast, shall be thine. Neverthelater, the firstborn of man shall be redeemed, and the firstborn of unclean beasts shall be redeemed.
Exodus 13:10
see thou keep therefore this ordinance in his season from year to year.
Numbers 3:45-51
"Take the Levites for all the firstborn of the children of Israel, and the cattle of the Levites for their cattle: and the Levites shall be mine, which am the LORD.
1 Samuel 9:7-8
Then said Saul to his lad, "If we go, what shall we bring the man? For our bread is all spent out of our hampers and there is none other present to bring the man of God. What have we?"
2 Samuel 24:24
But the king said unto Araunah, "Not so, but I will buy it of thee at a price, and will not offer sacrifice unto the LORD my God that shall cost me nought." And so David bought the threshing floor, and the oxen for fifty sicles of silver.