Hebrews 6:13-20 - The Reliability Of God's Promise
13 For when God gave his promise to Abraham, because he could swear by no greater, he sware by himself, saying,
14 "surely I will heap blessings upon thee, and will give thee a numerous posterity."
15 and after he had patiently waited, he obtained what was promised. 16 for when men swear by a superior, the ratifying what they say with an oath, puts an end to all further debate. 17 wherefore God was willing to give the heirs of promise a stronger proof of the immutability of his counsel, by the intervention of an oath: 18 that by two immutable things in which it was impossible for God to deceive us, we, who have no other refuge to fly to, but to maintain our present hopes, 19 might have strong consolation to serve as a sure and stedfast anchor to the soul: till it arrives within the veil, 20 where Jesus is gone to usher us in, having been made an high priest for ever, after the order of Melchisedec.