From Sahih Muslim (Hadith 3400):
Abdullah (b. Mas'ud) (Allah be pleased with him) reported that Allah's Messenger (ﷺ) said to us:0 young men, those among you who can support a wife should marry, for it restrains eyes (from casting evil glances) and preserves one from immorality; but he who cannot afford It should observe fast for it is a means of controlling the sexual desire
Reference: Muslim 3400