17 Ngokukholwa, kwathi u-Abhrahama ehlolwa nguNkulunkulu, wanikela u-Isaka njengomhlatshelo. Yena owayamukele izithembiso wayeseseduze ukuba anikele indodana yakhe eyodwa njalo eyiyo kuphela, 18 lanxa uNkulunkulu wayethe kuye, "isizukulwane sakho sizabalwa ngo-Isaka."11.18 UGenesisi 21.12 19 U-Abhrahama wanakana ukuthi uNkulunkulu wayengabavusa abafileyo, njalo nxa kuzekeliswa, wamamukela u-Isaka evela ekufeni.