(a) Salim bin Abdullah narrates from his father (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever trails his garment (below the ankles) out of arrogance, Allah Almighty will not look at him (with mercy) on the Day of Resurrection."
(b) Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) said: "O Messenger of Allah! One side of my waist-wrapper slips down, though I keep pulling it up." The Messenger of Allah (peace and blessings be upon him) said: "You are not", or he said: "You are not one of those who do this out of arrogance."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3314