'Tribes' in the Bible

Jesus said to them, “I assure you and most solemnly say to you, in the renewal [that is, the Messianic restoration and regeneration of all things] when the Son of Man sits on His glorious throne, you [who have followed Me, becoming My disciples] will also sit on twelve thrones, judging the twelve tribes of Israel.

And at that time the sign of the Son of Man [coming in His glory] will appear in the sky, and then all the tribes of the earth [and especially Israel] will mourn [regretting their rebellion and rejection of the Messiah], and they will see the Son of Man coming on the clouds of heaven with power and great glory [in brilliance and splendor].