'Gashed' in the Bible

Why should I forgive you?Your children have abandoned Meand sworn by those who are not gods.I satisfied their needs, yet they committed adultery;they gashed themselves at the prostitute’s house.

80 men came from Shechem, Shiloh, and Samaria who had shaved their beards, torn their garments, and gashed themselves, and who were carrying grain and incense offerings to bring to the temple of the Lord.