Keep

The L-RD appeared to Yitzhak and said, "Sojourn in this land, and I will be with you and will bless you, for to you and to your offspring I will give all these lands, and I will establish the oath that I swore to Avraham, your father. I will multiply your offspring as the stars of heaven and will give to your offspring all these lands. And in your offspring all the nations of the earth will be blessed, because Avraham obeyed My voice and kept my charge, my commandments, my statutes, and my laws." ~ Genesis 26:5

Which of G-d's commandments, statutes and laws did Avraham keep?