UGenesise 17:17-21

U-Abrahama wayesewa ngobuso bakhe, wahleka, wathi enhliziyweni yakhe: “Oneminyaka eyikhulu uyakuzalelwa na? USara oneminyaka engamashumi ayisishiyagalolunye uyakuzala na?” Wathi u-Abrahama kuNkulunkulu: “Sengathi u-Ishmayeli angaphila phambi kwakho.” UNkulunkulu wathi: “Qha, uSara umkakho uyakukuzalela indodana; uyakubiza igama layo ngokuthi u-Isaka; ngiyakusimisa isivumelwano sami naye, sibe yisivumelwano esiphakade nenzalo yakhe emva kwakhe. Ngo-Ishmayeli lo ngikuzwile; bheka, ngiyakumbusisa, ngimuphe inzalo, ngimandise kakhulu impela, azale izikhulu eziyishumi nambili, ngimenze isizwe esikhulu. Kepha ngiyakumisa isivumelwano sami no-Isaka azakukuzalela yena uSara ngalesi sikhathi ngomnyaka ozayo.”