'Seventy Sons' in the Bible

Gideon had seventy sons conceived from his body; for he had many wives.

that the violence done to the seventy sons of Jerubbaal might come, and that their blood might be laid on Abimelech their brother, who killed them, and on the men of Shechem, who strengthened his hands to kill his brothers.

Now Ahab had seventy sons in Samaria. Jehu wrote letters, and sent to Samaria, to the rulers of Jezreel, even the elders, and to those who brought up the sons of Ahab, saying,