give quarter

With discarded rifles and bombs lying about a trench, it is difficult to give quarter.

And the men swore a great oath, and kept it, never to give quarter to a Norman, as long as there was one left on English ground.

I know very well that my colored regiments at Memphis, officers and men, will never give quarter.

It appears to have been a maxim in these wars never to give quarter to an enemy, whether resisting or submitting.

He must give quarter, but it must be confessed that this is trying human nature rather high.