17 For every firstborn among the sons of Israel is mine, among man and among beast.+ On the day of my striking every firstborn in the land of Egypt+ I sanctified them to myself.+
19 “Every male firstborn that will be born in your herd and in your flock you should sanctify to Jehovah your God.+ You must do no service with the firstborn of your bull, nor shear the firstborn of your flock.+