Was bread and wine normally used in the sacrifices of Abraham's time?
No, bread and wine were not normally used in the sacrifices of Abraham's time. Melchizedek brought bread and wine, which was not the normal practice, and it served as a subtle prophecy of the Lord's Supper and the resurrection. This was a departure from the usual sacrificial elements.
Les teaches that Melchizedek, the High Priest of Salem—which later became Jerusalem—came to Abraham after Abraham had recaptured the people of Sodom and was returning from victory. Melchizedek brought forth bread and wine, which was not what they normally used in the sacrifices of Abraham's day. Les explains this was a subtle prophecy, pointing to the Lord's Supper that Jesus administered in Matthew 26 and that is explained in 1 Corinthians 11: a constant reminder of the resurrection.