Acts 2:21
And everyone who calls on the name of the Lord will be saved.' — the universal salvation promise (pas hos an epikaleō, everyone who calls upon) connects to Joel's prophecy and becomes the pivot of Peter's sermon's call to response. To call on the name of the Lord is to invoke God for salvation, a phrase rooted in Abraham's practice (Genesis 12:8) and extended now to all who believe in Jesus as Lord (kyrios).