Three times a year all your males
shall appear before Yahweh your God
in the place which He chooses: (Jerusalem)

at the Feast of Unleavened Bread, (First fruits of the Barley Harvest – Resurrection)
at the Feast of Weeks, (Pentecost – Celebrating the wheat harvest)
and at the Feast of Tabernacles; (Final ingathering of the fruit harvest)

and they shall not appear before the LORD empty-handed.
(Deu 16:16)