GAL 3:18

18 Remember that if it is because [we obey God’s] laws [that he gives to us] what [he has] promised [to give to us], then it is not [just] because he [has] promised [that he would give those things to us]. God freely gave to Abraham [what he had promised to give to him, just] because [God had] promised [that he would give it to him. Similarly, it is not because we obey God’s laws that God gives to us what he has promised to give to us].