He tells Abraham his descendants will go intoa foreign land and be slaves for 400yrs the he will punish the one who enslaves them and infact they leave the land of their sojourning rich, after 430yrs the Israelite leaves Egypt with all the assets after the ten plagues. He also told Abraham that circumcision is a must for a male jew and a bought slave otherwise their soul will be cut out, when Moses failsto circumcise his son He’s nearly killed his wife saves him by quickly circumcising their son and throwing the foreskin at Moses