'Feast' in the Bible

On the fifteenth day of this month there is to be a feast; for seven days let your food be unleavened cakes.

And at the time of the first-fruits, when you give an offering of new meal to the Lord at your feast of weeks, there is to be a holy meeting: you may do no field-work:

And on the fifteenth day of the seventh month let there be a holy meeting; do no field-work, and keep a feast to the Lord for seven days;

On the second day of the feast give an offering of twelve oxen, two male sheep, fourteen he-lambs of the first year, without any mark on them;