Day by day Delilah urged him, until “his soul was vexed unto death;” yet a subtle power kept him by her side. Overcome at last, Samson made known the secret: “There hath not come a razor upon mine head; for I have been a Nazarite unto God from my mother's womb: if I be shaven, then my strength will go from me, and I shall become weak, and be like any other man.” A messenger was immediately dispatched to the lords of the Philistines, urging them to come to her without delay. While the warrior slept, the heavy masses of his hair were severed from his head. Then, as she had done three times before, she called, “The Philistines be upon thee, Samson!” Suddenly awaking, he thought to exert his strength as before and destroy them; but his powerless arms refused to do his bidding, and he knew that “Jehovah was departed from him.” When he had been shaven, Delilah began to annoy him and cause him pain, thus making a trial of his strength; for the Philistines dared not approach him till fully con…
"And it came to pass, when she pressed him daily with her words, and urged him, so that his soul was vexed unto death;"
EGW directly quotes Judges 16:16.
"In suffering and humiliation, a sport for the Philistines, Samson learned more of his own weakness than he had ever known before; and his afflictions led him to repentance. As his hair grew, his power gradually returned; but his enemies, regarding him as a fettered and helpless prisoner, felt no apprehensions. PP 566.3"
"Before I was afflicted I went astray: but now have I kept thy word."
Both passages connect affliction with repentance and a return to God's favor. The Samson passage specifically mentions repentance as a result of suffering, echoing the sentiment in Psalm 119:67.
The Philistines ascribed their victory to their gods; and, exulting, they defied the God of Israel. A feast was appointed in honor of Dagon, the fish god, “the protector of the sea.” From town and country throughout the Philistine plain the people and their lords assembled. Throngs of worshipers filled the vast temple and crowded the galleries about the roof. It was a scene of festivity and rejoicing. There was the pomp of the sacrificial service, followed by music and feasting. Then, as the crowning trophy of Dagon's power, Samson was brought in. Shouts of exultation greeted his appearance. People and rulers mocked his misery and adored the god who had overthrown “the destroyer of their country.” After a time, as if weary, Samson asked permission to rest against the two central pillars which supported the temple roof. Then he silently uttered the prayer, “O Lord God, remember me, I pray Thee, and strengthen me, I pray Thee, only this once, O God, that I may be at once avenged of the P…
"Then the lords of the Philistines gathered them together for to offer a great sacrifice unto Dagon their god, and to rejoice: for they said, Our god hath delivered Samson our enemy into our hand."
Both passages describe the Philistines' celebration and sacrifice to Dagon after capturing Samson. EGW elaborates on the scene, including Samson's prayer, which is implied but not directly quoted in Judges 16:23.