at this time, &c.: i.e. "at the time when ye would have incurred guilt [by so doing]".
Related Commentaries of Judges 21:22
Judges 21:22
22 And it shall be, when their fathers or their brethren come unto us to complain, that we will say unto them, Be favourablee unto them for our sakes: because we reserved not to each man his wife in the war: for ye did not give unto them at this time, that ye should be guilty.