a feast of the Jews: Jesus returned to Jerusalem for this celebration. Because of this, it was likely one of the three main pilgrimage festivals (special festivals when people traveled to Jerusalem).
In the Old Testament, God commanded Israel to celebrate three such festivals each year (see Exodus 23:14–17; Deuteronomy 16:16). These were the Feast of Unleavened Bread (also called Passover), the Feast of Weeks, and the Feast of Tabernacles.
Each of these festivals lasted about one week. During that time, many people gathered in Jerusalem to worship God.