For every firstborn male in Israel is Mine, both man and beast. I set them apart for Myself on the day I struck down all the firstborn in the land of Egypt.
Jewish Publication Society of America Version (JPS1917) - Numbers 8:17 >For all the first-born among the children of Israel are Mine, both man and beast; on the day that I smote all the first-born in the land of Egypt I sanctified them for Myself.