The Bible does not say specifically, but it reveals that Abraham was of the ninth generation descended from Shem, one of Noah’s sons and a man of great faith.
أَمَّا إِبْرَاهِيمُ فَمَعَهُ سِكِّينٌ وَمَا يَلْزَمُ لِإِشْعَالِ ٱلنَّارِ .‏