'Assembly' in the Bible

You shall keep it until the fourteenth day of the same month, then the whole assembly of the congregation of Israel is to slaughter it at twilight.

On the first day [of the feast] you shall have a holy and solemn assembly, and on the seventh day there shall be another holy and solemn assembly; no work of any kind shall be done on those days, except for the preparation of food which every person must eat—only that may be done by you.

and the Israelites said to them, “Would that we had died by the hand of the Lord in the land of Egypt, when we sat by the pots of meat and ate bread until we were full; for you have brought us out into this wilderness to kill this entire assembly with hunger.”