Mishkat al-Masabih 13 Marriage كتاب النكاح 11

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا خَطَبَ إِلَيْكُمْ مَنْ تَرْضَوْنَ دِينَهُ وَخُلُقَهُ فَزَوِّجُوهُ إِنْ لَا تَفْعَلُوهُ تَكُنْ فِتَنَةٌ فِي الْأَرْضِ وَفَسَادٌ عَرِيضٌ» . رَوَاهُ التِّرْمِذِيُّ

He reported God’s Messenger as saying, “When someone with whose religion and character you are satisfied asks your daughter in marriage, accede to his request. If you do not do so there will be temptation in the earth and extensive corruption.” Tirmidhi transmitted it.