Hebrews 6:13-15 For when God made promise to Abraham, because he could swear by no greater, he swore by himself, Saying, Surely blessing I will bless thee, and multiplying I will multiply thee. And so, after he had patiently endured, he obtained the promise. 

‘Obtained the promise.’ The promise referred to in this verse is the supernatural birth of Isaac, but forty-eight promises were given to Abraham (continues): I will multiply you exceedingly (Gen. 17:2; 22:17). You will be the father of many nations (Gen. 17:5-6). I will make you exceedingly fruitful (Gen. 17:6). Kings shall come from you. I will make a covenant with your seed eternally (Gen. 17:7). I will be a God to you and your seed (Gen. 17:7-8). I will bless your wife (Gen. 17:16). I will give you a son from her (Gen. 17:16-19). She shall be a mother of many nations (Gen. 17:16). Kings shall come of her. I will establish My everlasting covenant with Isaac and his seed (Gen. 17:19-21). I will bless Ishmael (Gen. 17:20). I will make him fruitful. I will multiply him abundantly. He shall beget twelve princes. I will make him a great nation. Sarah shall have a son next year (Gen. 17:21; 18:10, 14). I will not destroy Sodom if I find fifty righteous people (Gen. 18:26). I will not destroy the city if I find forty-five righteous people (Gen. 18:28). I will not destroy it if I find forty righteous people (Gen. 18:29). I will not destroy it if I find thirty righteous people (Gen. 18:30). I will not destroy it if I find twenty righteous people (Gen. 18:31). I will not destroy it if I find ten righteous people (Gen. 18:32). In Isaac shall your seed be called (Gen. 21:12). I will multiply your seed as the sand in number (Gen. 22:17). Your seed shall be the victor over their enemies. In your seed shall all nations be blessed (Came through the Gospel and Jesus Christ).