Exodus 23:14-19 - Laws For Three Festivals
14 " 'Three times in the year you will hold a festival for me 15 You will keep the Feast of Unleavened Bread; for seven days you will eat unleavened bread, as I commanded you at [the] appointed time, the month of Abib, because in it you came out from Egypt, and {no one will} appear before me empty-handed. 16 And [you will keep] the Feast of Harvest, [with] the firstfruits of your work, what you sow in the field. And [you will keep] the Feast of Harvest Gathering when the year goes out, when you gather your work from the field. 17 Three times in the year all your men will appear before the Lord Yahweh.
18 " 'You will not sacrifice the blood of my sacrifice together with [food with] yeast, and you will not leave the fat of my feast overnight until morning.
19 " 'The best of the firstfruits of your land you will bring to the house of Yahweh your God. " 'You will not boil a young goat in its mother's milk.