Genesis 4:2-4

NSB(i) 2 Later she gave birth to his brother Abel. Now Abel kept flocks, and Cain worked the soil. 3 As time went by, Cain brought some of the fruits of the soil as an offering to Jehovah. 4 But Abel brought fat portions from some of the firstborn (firstlings) of his flock. Jehovah looked with favor on Abel and his offering.