4 So David and his men wept aloud until they had no strength left to weep.

Read 1 Samuel 30:4 Using Other Translations

Then David and the people that were with him lifted up their voice and wept, until they had no more power to weep.
Then David and the people who were with him raised their voices and wept until they had no more strength to weep.
they wept until they could weep no more.