'Keep' in the Bible

Haman said to King Ahasuerus, "There is a certain people scattered abroad and dispersed among the peoples in all the provinces of your kingdom, and their laws are different than other people's. They don't keep the king's laws. Therefore it is not for the king's profit to allow them to remain.

to enjoin them that they should keep the fourteenth and fifteenth days of the month Adar yearly,

the Jews established, and imposed on themselves, and on their descendants, and on all those who joined themselves to them, so that it should not fail, that they would keep these two days according to what was written, and according to its appointed time, every year;