3 Then his father and his mother said unto him, Is there never a woman among the daughters of thy brethren, or among all my people, that thou goest to take a wife of the uncircumcised Philistines? And Samson said unto his father, Get her for me; for she pleaseth me well.
[AD 397] Ambrose of Milan on Judges 14:1-3
Samson, then graced by such favors from heaven, turned his thoughts to marriage as soon as he reached manhood, whether because he detested in his mind the free and familiar manner of deceitful lust in the young, or because he was seeking a reason for loosing from the necks of his people the power and harsh tyranny of the Philistines. Going down, therefore, to Thamnatha [Timnah] (this is the name of a city in that country which then was inhabited by the Philistines), he saw a maiden of pleasing appearance and beautiful countenance. He asked his parents, who were guiding him on his way, to ask her in marriage for him. They did not realize that his purpose was so set that, if the Philistines refused her to him, he would become very angry, nor that they, if they gave their consent, would be bringing an end to the wrong treatment of the conquered. Since from intercourse a sense of equality and kindness grows apace, and, if offense is given, the desire for revenge becomes deeper, his parents thought that he should avoid her because she was a stranger. In vain did they try to change his purpose by lawful objections; finally, then, they gave their consent to the wishes of their son.

[AD 1781] Richard Challoner on Judges 14:3
Is there no woman among the daughters of thy brethren: This shows his parents were at first against his marriage with a Gentile, it being prohibited, Deut. 7. 3; but afterwards they consented, knowing it to be by the dispensation of God; which otherwise would have been sinful in acting contrary to the law.