30 and thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength; this is the first commandment.
Mark 12:30 Cross References - JPS_ASV_Byz
Deuteronomy 6:5
5 And thou shalt love the LORD thy God with all thy heart, and with all thy soul, and with all thy might.