Deuteronomy:16:16-17
jps@Deuteronomy:16:16 @ Three times in a year shall all thy males appear before the LORD thy God in the place which He shall choose; on the feast of unleavened bread, and on the feast of weeks, and on the feast of tabernacles; and they shall not appear before the LORD empty;
jps@Deuteronomy:16:17 @ every man shall give as he is able, according to the blessing of the LORD thy God which He hath given thee.