“Again he went out about the sixth and the ninth hour, and did the same.”
Again perhaps His manager twice warns Him that with the workforce that they have the work will not be finished by the evening. But whatever the reason He goes out around noon and then again around 3:00 pm. (15:00 hours). And again He hires labourers on the same terms as the previous ones at 9:00 am, the terms of trust and obedience. His operations are to go on all through the day.