'Seventy Sons' in the Bible

Now Gideon had seventy sons, his own offspring, for he had many wives.

that the violence done to the seventy sons of Jerubba'al might come and their blood be laid upon Abim'elech their brother, who slew them, and upon the men of Shechem, who strengthened his hands to slay his brothers.

Now Ahab had seventy sons in Samaria. And Jehu wrote letters, and sent to Samaria, to the princes of Jizreel, to the elders, and to Ahab's guardians, saying,