Judges 16:7

But he, still self-possessed and unshaken, opposed craft to the allurements of the harlot, and told her that if he were bound with withs yet green and not dried, his strength would be like that of other men.

It is said that Samson, according to the instruction of the Angel, did not permit a razor to come upon his head; but his hair grew, and he became the strongest of men. It was a wondrous thing that with his hair he was strong, and without hair he became weak. Delilah the harlot deceived him: she asked him where his strength lay. Four times she asked him, and the fourth time he told her the truth, but the first three times he concealed the truth from her. The first time he said: "If I am bound with seven cords of sinew," I shall be like other men; and when he was bound and the Philistines came upon him to seize him, he immediately broke the cords. Again she asked him where his strength lay, and he said: "If I am bound with seven new ropes that have not yet been put to use," I shall be like other men. The third time he said to her: "If you fasten seven locks of my hair into the ground with a pin," I shall be like other men. The fourth time he revealed the truth to her and said: "If you shave the seven locks of hair that are on my head, I shall be like other men"; and then the Philistines seized him. What does this mean? — I say that the shaving of the hair signifies the withdrawal of the sevenfold grace of the Holy Spirit. Concerning all the Saints it is clear that, as long as the grace of the Holy Spirit remained with them, they were strong. — Why did he not tell her where his strength lay? See, in the loss of the Holy Spirit there is this progression; by this path the Holy Spirit is lost. There are four enticements of the senses, namely preoccupation, cogitation, the bending of the interior affections, and the assault upon the divine laws. In the last the Holy Spirit is lost, but in the others a man is disposed toward this. First the devil offers sensory pleasures; and this is to be bound with "seven cords of sinew." Afterward, when a man lingers in thoughts upon the pleasure offered, then he is bound with "seven new ropes that have not yet been put to use." Next follows the bending of the affections: just as from a multitude of rays heat is generated, so when there is manifold cogitation in the soul, the soul is bent toward that thing; and this is signified by the binding of the hair with a pin in the ground. Still the man does not lose the Holy Spirit. But fourthly follows the assault upon the divine laws, when the hair of the head is shaved off, that is, when the grace of the Holy Spirit is withdrawn.