He went to his father's house at Ophrah, and killed his brothers the sons of Jerubbaal, being seventy persons, on one stone: but Jotham the youngest son of Jerubbaal was left; for he hid himself.
for he hid himself; for no doubt Abimelech, and his crew, were most forward to lay hold of the eldest, and sacrifice them first, as being most in his way; this gave Jotham the youngest not only notice of their design, but an opportunity of providing for his safety, or however his friends; for it may be rendered, as in some versions, "he was hidden" b, that is, by others.