'On the Sabbath' in the Bible

He commanded them, saying, “This is the thing that you shall do: one third of you, who come in on the sabbath and keep watch over the king’s house

Two parts of you, even all who go out on the sabbath, shall also keep watch over the house of the Lord for the king.

So the captains of hundreds did according to all that Jehoiada the priest commanded. And each one of them took his men who were to come in on the sabbath, with those who were to go out on the sabbath, and came to Jehoiada the priest.