NET
3 They were unable to observe it at the regular time because not enough priests had consecrated themselves and the people had not assembled in Jerusalem.
Darby
3 For they could not keep it at that time, because the priests had not hallowed themselves in sufficient number, neither had the people been gathered together to Jerusalem.
KJV
3 For they could not keep it at that time, because the priests had not sanctified themselves sufficiently, neither had the people gathered themselves together to Jerusalem.