It is narrated from Sayyiduna Abu Tha'labah al-Khushani (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The most beloved of you to me, and the closest of you to me in sitting in the Hereafter, are those of you who are best in character; and the most hateful of you to me, and the furthest of you from me in the Hereafter, are those of you who are worst in character: the chatterers, those who speak with affected mouths, and those who pretentiously parade their learning."
Hadith Referenceالمعجم الكبير للطبراني / باب اللام ألف / 18808