American Standard Version (ASV):
And he commanded them, saying, This is the thing that ye shall do: a third part of you, that come in on the sabbath, shall be keepers of the watch of the king’s house;
King James Version (KJV):
And he commanded them, saying, This [is] the thing that ye shall do; A third part of you that enter in on the sabbath shall even be keepers of the watch of the king’s house;