As Hebrews 6:13 says, For when God made a promise to Abraham, because He could swear by no one greater, He swore by Himself.
13 Hikuva loko Xikwembu xi endla xitshembiso xa xona eka Abrahama,+ leswi a xi nga ta hlambanya+ hi munhu un'wana lonkulu, xi hlambanye ha xona n'wini,