Exodus 23:16; Exodus 23:19

16 "Also you shall observe the Feast of the Harvest of the first fruits of your labors from what you sow in the field; also the Feast of the Ingathering at the end of the year when you gather in the fruit of your labors from the field.

19 "You shall bring the choice first fruits of your soil into the house of the LORD your God. " You are not to boil a young goat in the milk of its mother