Exodus 23:17

17 aThree times in the year shall all your males appear before the Lord God.

Deuteronomy 16:16-17

16 bThree times a year all your males shall appear before the Lord your God at the place that he will choose: at the Feast of Unleavened Bread, at the Feast of Weeks, and at the Feast of Booths. cThey shall not appear before the Lord empty-handed. 17Every man dshall give as he is able, eaccording to the blessing of the Lord your God that he has given you.

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