17 Igihe Aburahamu yashizwe ku kigeragezo, kwizeera yari afite byatumye yeemera gutamba Isaaka. Nuubwo yari yarahaawe iseezerano, yari yiiteguuye gutamba umwana we w’ikinege 18 uwo Imaana yari yaramubwiye iti, "Kuri Isaaka ni ho urubyaro rwawe ruzaakwitirirwa." 19 Aburahamu yiizeeraga ko Imaana ishobora kuzuura uwapfuuye ikamugira muzima. Kandi koko ubigereranyije, Isaaka yagarurijwe Aburahamu nk’uzuutse.