Bikkurim בכורים

You shall take from the first of all the fruit of the ground, which you shall bring in from your land that יהוה your God gives you; and you shall put it in a basket and go to the place which יהוה your God shall choose for God's name to dwell. You shall come to the priest that shall be inthose days, and say to him: ‘I witness this day to יהוה your God, that I have come to the land which יהוה swore unto our ancestors to give us.’ And the priest shall take the basket out of your hand, and set it down before the altar of יהוה your God. And you shall speak and say before יהוה your God: ‘A wandering Aramean was my father... יהוה brought us forth out of Egypt ... God has brought us to this place, and has given us this land, a land flowing with milk and honey.’

(1) How does one designate the Bikkurim [first-fruits that must be brought to the Temple in Jerusalem and given to the Kohen]? A person goes to one's field and sees a date that is bearing fruit, a bunch [of grapes] that is bearing fruit, or a pomegranate that is bearing fruit, and ties it with a string and says, "Behold these are Bikkurim." ...

(6) With the basket still on one's shoulder, one would recite from "I declare today to the Lord my God" (Deuteronomy 26:3-10) ...

In the process of time it came to pass, that Cain brought of the fruit of the ground an offering unto יהוה. And Abel, he also brought of the firstlings of his flock and of the fat thereof. And יהוה had regard for Abel and his offering; but God did not have regard for Cain and his offering...

It shall be when your son asks you in time to come, saying: What is this? that you shall say to him: By strength of hand יהוה brought us out from Egypt, from the house of bondage; and it came to pass, when Pharaoh would hardly let us go that יהוה slew all the firstborn in the land of Egypt, both the first-born of man, and the first-born of beast; therefore I sacrifice to יהוה all that opens the womb, being males; but all the first-born of my sons I redeem.