Judges 15:18-19

Because he was very thirsty, he cried out to the LORD, “You have given your servant this great victory. Must I now die of thirst and fall into the hands of the uncircumcised?” Then God opened up the hollow place in Lehi, and water came out of it. When Samson drank, his strength returned and he revived. So the spring was called En Hakkore, and it is still there in Lehi.