Albert Barnes Commentary Leviticus 24:14

"Bring forth him that hath cursed without the camp; and let all that heard him lay their hands upon his head, and let all the congregation stone him." — Leviticus 24:14 (ASV)

Lay their hands upon his head - As a protest against the impiety of the criminal, symbolically laying the guilt upon his head. Compare the washing of hands (Deuteronomy 21:6; Matthew 27:24).

Let all the congregation stone him - See Leviticus 20:2 note.