In the name of Allah, Most Gracious, Most Merciful.
قال النبي صلى الله عليه وسلم: (إذا خطب إليكم من ترضون دينه وخلقه فزوجوه؛ إلا تفعلوا تكن فتنة في الأرض، وفساد عريض) رواه الترمذي
Abu Hurairah (May Allah be pleased with him) reported: “The Prophet (May Allah exalt his mention and protect him from imperfection) said: “When someone proposes marriage to one of you whose religion and character pleases you, then you should let him marry. If you do not do so, there will be tribulations in the earth and the proliferation of corruption.” (Sunan At-Tirmidhi, Book of Marriage, Number 1084, Silsilatou al-ahadith as-Sahih, 1022 – authenticated by al-Albânî)
Commentary: The hadith mentions two aspects to look for when there is a marriage proposal: Religion AND character (morality). Not only religion and not only character. What is required is a complete Muslim personality. Allah Alim.
Source: Internet Site