John Gill Commentary 1 Samuel 30:4

"Then David and the people that were with him lifted up their voice and wept, until they had no more power to weep." — 1 Samuel 30:4 (ASV)

Then David and the people that [were] with him lifted up their
voice
In doleful shrieks, and loud lamentations:

and wept, until they had no more power to weep ;
till nature was quite exhausted, and no moisture left; so the Vulgate Latin version, "till tears failed in them"; they could shed no more.