'Assembly' in the Bible

and Jehovah delivered to me the two tables of stone written with the finger of God; and on them was written according to all the words which Jehovah spoke with you on the mountain from the midst of the fire on the day of the assembly.

And he wrote on the tables, as the first writing, the ten words which Jehovah spoke unto you on the mountain, from the midst of the fire, on the day of the assembly, and Jehovah gave them unto me.

Six days thou shalt eat unleavened bread, and on the seventh day is a solemn assembly to Jehovah thy God; thou shalt do no work.

according to all that thou desiredst of Jehovah thy God at Horeb on the day of the assembly, saying, Let me not hear again the voice of Jehovah my God, neither let me see this great fire any more, that I die not.