Albert Barnes Commentary Matthew 7:22

"Many will say to me in that day, Lord, Lord, did we not prophesy by thy name, and by thy name cast out demons, and by thy name do many mighty works?" — Matthew 7:22 (ASV)

In that day. That is, in the last day, the day of judgment; the time when the principles of all pretenders to prophecy and piety will be tried. (Prophesied in thy: Numbers 24:4; 1 Kings 22:11; Jeremiah 23:13; Acts 19:13–15).