'Seventy Sons' in the Bible

Gideon had seventy sons, the offspring of his body; for he had a number of wives.

Say now in the ears of all the townsmen of Shechem, Is it better for you to be ruled by all the seventy sons of Jerubbaal or by one man only? And keep in mind that I am your bone and your flesh.

Then he went to his father's house at Ophrah, and put his brothers, the seventy sons of Jerubbaal, to death on the same stone; however, Jotham, the youngest, kept himself safe by going away to a secret place.

So that punishment for the violent attack made on the seventy sons of Jerubbaal, and for their blood, might come on Abimelech, their brother, who put them to death, and on the townsmen of Shechem who gave him their help in putting his brothers to death.