Charles Ellicott Commentary Judges 16:18

"And when Delilah saw that he had told her all his heart, she sent and called for the lords of the Philistines, saying, Come up this once, for he hath told me all his heart. Then the lords of the Philistines came up unto her, and brought the money in their hand." — Judges 16:18 (ASV)

Saw that he had told her all his heart. — She could not mistake the accent of truthfulness, nor was Samson so far gone as to be able to reveal the great secret without some sense of awe and shame.

Money. — Rather, the silver (Judges 16:5).