What did God promise to do for Ishmael, and did Ishmael receive the covenant?

Les explains that in verse 19 God told Abraham that Sarah would bear a son named Isaac, and God would establish His covenant with Isaac for an everlasting covenant and with his seed after him. Then in verse 20, concerning Ishmael, the son of the bondwoman, God said He had heard Abraham, had blessed Ishmael, would make him fruitful, multiply him exceedingly, give him twelve princes, and make him a great nation. But God explicitly stated, 'my covenant I will establish with Isaac,' meaning the Abrahamic covenant continued through Isaac, not Ishmael. Les also notes that God loves the Arab people and they have the same opportunity for salvation by grace through faith, yet the covenant promise was not given to Ishmael.