Feasts: (Instituted by Moses): Designated As Solemn Feasts
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Numbers 15:3
and you present an offering made by fire to the LORD from the herd or flock to produce a pleasing aroma to the LORD—either a burnt offering or a sacrifice, for a special vow or freewill offering or appointed feast—
2 Chronicles 8:13
He observed the daily requirement for offerings according to the commandment of Moses for Sabbaths, New Moons, and the three annual appointed feasts—the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Tabernacles.
Lamentations 2:6
He has laid waste His tabernacle like a garden booth; He has destroyed His place of meeting. The LORD has made Zion forget her appointed feasts and Sabbaths. In His fierce anger He has despised both king and priest.
Ezekiel 46:9
When the people of the land come before the LORD at the appointed feasts, whoever enters by the north gate to worship must go out by the south gate, and whoever enters by the south gate must go out by the north gate. No one is to return through the gate by which he entered, but each must go out by the opposite gate.