So God opened up the hollow place in Lehi, and water came out of it. When Samson drank, his strength returned, and he was revived. That is why he named it En-hakkore, and it remains in Lehi to this day.
Jewish Publication Society of America Version (JPS1917) - Judges 15:19 >But God cleaved the hollow place that is in Lehi, and there came water thereout; and when he had drunk, his spirit came back, and he revived; wherefore the name thereof was called En-hakkore, which is in Lehi unto this day.