1 Chronicles 9:25

Their brothers, in their villages, were to come in every seven days from time to time to be with them:

2 Kings 11:5

He commanded them, saying, "This is the thing that you shall do: a third part of you, who come in on the Sabbath, shall be keepers of the watch of the king's house;

2 Chronicles 23:8

So the Levites and all Judah did according to all that Jehoiada the priest commanded: and they took every man his men, those who were to come in on the Sabbath; with those who were to go out on the Sabbath; for Jehoiada the priest didn't dismiss the shift.

2 Kings 11:7

The two companies of you, even all who go out on the Sabbath, shall keep the watch of the house of Yahweh around the king.

Treasury of Scripture Knowledge

Summary

And their brethren, which were in their villages, were to come after seven days from time to time with them.

Bible References

Seven

2 Kings 11:5
He commanded them, saying, "This is the thing that you shall do: a third part of you, who come in on the Sabbath, shall be keepers of the watch of the king's house;
2 Chronicles 23:8
So the Levites and all Judah did according to all that Jehoiada the priest commanded: and they took every man his men, those who were to come in on the Sabbath; with those who were to go out on the Sabbath; for Jehoiada the priest didn't dismiss the shift.