firstling

Exodus 13:10
Therefore you shall keep this ordinance at the appointed time year after year.

Numbers 18:15
The firstborn of every womb, whether man or beast, that is offered to the LORD belongs to you. But you must surely redeem every firstborn son and every firstborn male of unclean animals.

lamb or kid.

Exodus 13:15
And when Pharaoh stubbornly refused to let us go, the LORD killed every firstborn in the land of Egypt, both of man and beast. This is why I sacrifice to the LORD the firstborn male of every womb, but I redeem all the firstborn of my sons.'

Numbers 3:45-51
"Take the Levites in place of all the firstborn of Israel, and the cattle of the Levites in place of their cattle. The Levites belong to Me; I am the LORD. . . .

none

Exodus 23:15
You are to observe the Feast of Unleavened Bread as I commanded you: At the appointed time in the month of Abib you are to eat unleavened bread for seven days, because that was the month you came out of Egypt. No one may appear before Me empty-handed.

Deuteronomy 16:16
Three times a year all your men are to appear before the LORD your God in the place He will choose: at the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Tabernacles No one should appear before the LORD empty-handed.

1 Samuel 9:7, 8
"If we do go, " Saul replied, "what can we give the man? For the bread in our packs is gone, and there is no gift to take to the man of God. What do we have?" . . .

2 Samuel 24:24
"No, " replied the king, "I insist on paying a price, for I will not offer to the LORD my God burnt offerings that cost me nothing." So David bought the threshing floor and the oxen for fifty shekels of silver.