Moses declared to the children of Israel the appointed feasts of Yahweh.
TSK
TSK · Leviticus 23:1
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and to offer all burnt offerings to Yahweh, on the Sabbaths, on the new moons, and on the set feasts, in number according to the ordinance concerning them, continually before Yahweh;
even as the duty of every day required, offering according to the commandment of Moses, on the Sabbaths, and on the new moons, and on the set feasts, three times in the year, [even] in the feast of unleavened bread, and in the feast of weeks, and in the feast of tents.
In a controversy they shall stand to judge; according to my ordinances shall they judge it: and they shall keep my laws and my statutes in all my appointed feasts; and they shall make my Sabbaths holy.
In the feasts and in the solemnities the meal offering shall be an ephah for a bull, and an ephah for a ram, and for the lambs as he is able to give, and a hin of oil to an ephah.
Let no one therefore judge you in eating, or in drinking, or with respect to a feast day or a new moon or a Sabbath day,