Deuteronomy 16:15 in the King James Version
Seven days shalt thou keep a solemn feast unto the LORD thy God in the place which the LORD shall choose: because the LORD thy God shall bless thee in all thine increase, and in all the works of thine hands, therefore thou shalt surely rejoice.
Context
14 You shall rejoice in your feast, you, your son, your daughter, your male servant, your female servant, the Levite, the foreigner, the fatherless, and the widow who are within your gates.
15 You shall keep a feast to the LORD your God seven days in the place which the LORD chooses, because the LORD your God will bless you in all your increase and in all the work of your hands, and you shall be altogether joyful.
16 Three times in a year all of your males shall appear before the LORD your God in the place which he chooses: in the feast of unleavened bread, in the feast of weeks, and in the feast of booths. They shall not appear before the LORD empty.