Acts 4:27

For of a truth against thy holy child Jesus, whom thou hast anointed, both Herod, and Pontius Pilate, with the Gentiles, and the (l) people of Israel, were gathered together,

(l) Although the people of Israel were but one people, yet the plural number is used here, not so much for the twelve tribes, every one of which counted as a people, but because of the great multitude of them, as though many nations had assembled themselves together, as in (Judges 5:14).