For the LORD will vindicate His people and have compassion on His servants when He sees that their strength is gone and no one remains, slave or free.
KJV
For the LORD shall judge his people, and repent himself for his servants, when he seeth that [their] power is gone, and [there is] none shut up, or left.
ASV
For Jehovah will judge his people, And repent himself for his servants; When he seeth that their power is gone, And there is none remaining, shut up or left at large.