The Prophet (peace and blessings be upon him) said: "When someone whose religion and character you are pleased with comes to you (with a proposal), then marry (your daughter) to him. If instead you marry her to someone else, there will be fitnah and great corruption." The Companions (may Allah be pleased with them) said: "Even if there is (something) in him?" Yet he (peace and blessings be upon him) said the same words again and repeated them three times.
Abu Hatim al-Muzani was a Companion; al-Bukhari and others said so.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13481