During which feast did the Israelites live in booths for seven days?

Answer: Feast of Tabernacles

At the Feast of Tabernacles Israel dwelt in booths for seven days, recalling how God housed them in booths after Egypt.

““Speak to the Israelites and say, ‘On the fifteenth day of the seventh month the Feast of Tabernacles to the LORD begins, and it continues for seven days.”— Leviticus 23:34 (BSB)