She made him sleep, by some sleepy potion, which it is like she gave him upon other pretences, agreeable enough to his present and vitiated inclination.
Upon her knees; resting his head upon her knees.
She caused him to shave off, with a gentle hand, as if she herself had been but sporting with him. She did this more securely, partly because she had cast him into a deep sleep, and partly because if he had discovered it before it was finished, she would have said it was only an innocent intention to try the sincerity of his affection to her, and the truth of this last relation, which she had so just reason to doubt of, from his frequent dissimulation and lies.
She began to afflict him, i.e. to disturb, and awaken, and affright him, as by other ways, so particularly by crying out in a terrible manner,
The Philistines are upon thee, as she had done before, and as it follows, Jud_16:20.
His strength went from him; which, as is here implied, she perceived, because he could not now shake himself as he did before, i.e. with equal rigour and might, as is intimated in the next verse; or because she had bound him, though it be not here expressed, and found him unable to break his bands.