For they had not been able to keep it at its proper time. For the priests, who were unable to suffice, had not been sanctified. And the people had not yet been gathered together in Jerusalem
Other versions
King James Version
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.English Standard Version
for they could not keep it at that time because the priests had not consecrated themselves in sufficient number, nor had the people assembled in Jerusalem--New International Version
They had not been able to celebrate it at the regular time because not enough priests had consecrated themselves and the people had not assembled in Jerusalem.