v. phr. , literary To be the first to blame someone, lead accusers against a wrongdoer. Jesus said that a person who was without sin could cast the first stone. Although Ben saw the girl cheating, he did not want to cast the first stone.
CAST THE FIRST STONE
Meaning of CAST THE FIRST STONE in English
American idioms English vocabulary. Английский словарь американских идиом. 2012