From the Quran
وَلۡیَسۡتَعۡفِفِ ٱلَّذِینَ لَا یَجِدُونَ نِكَاحًا حَتَّىٰ یُغۡنِیَهُمُ ٱللَّهُ مِن فَضۡلِهِۦ
And let those who find not the financial means for marriage keep themselves chaste, until Allah enriches them of His Bounty.
-Surah An-Nur, Ayah 33
Hadith: Arabic Text followed by English Translation.
عَنْ عَبْدِ اللَّهِ، قَالَ قَالَ لَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم
يَا مَعْشَرَ الشَّبَابِ مَنِ اسْتَطَاعَ مِنْكُمُ الْبَاءَةَ فَلْيَتَزَوَّجْ فَإِنَّهُ أَغَضُّ لِلْبَصَرِ وَأَحْصَنُ لِلْفَرْجِ وَمَنْ لَمْ يَسْتَطِعْ فَعَلَيْهِ بِالصَّوْمِ فَإِنَّهُ لَهُ وِجَاءٌ ”
رواه مسلم، ١٤٠٠
Abdullah (b. Mas’ud) (Allah be pleased with him) reported that Allah’s Messenger (ﷺ) said to us:
O 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.
Sahih Muslim 1400 c