Leviticus 23:37
" 'These [are] Yahweh's festivals, which you must proclaim, holy assemblies to present an offering made by fire to Yahweh--burnt offering and grain offering, sacrifice and libations, {each on its proper day}--
Leviticus 23:2
"Speak to the {Israelites}, and say to them, 'The festivals of Yahweh that you shall proclaim [are] holy assemblies; these [are] my appointed times.
Leviticus 23:4
" 'These [are] Yahweh's appointed times, holy assemblies, which you shall proclaim at their appointed time
Deuteronomy 16:16-17
Three times in the year all [of] your males shall appear {before } Yahweh your God at the place that he will choose, at the Feast of Unleavened Bread and at the Feast of Weeks and at the Feast of Booths, and they shall not appear {before Yahweh} empty-handed.
Ecclesiastes 3:1
For everything there [is] an appointed time, a time for every matter under heaven: