The Messenger of Allah ﷺ said, "No one will enter Paradise who has in his heart the weight of a mustard seed of arrogance, and no one will enter the Fire who has in his heart the weight of a mustard seed of faith."
حدثنا أبو هشام الرفاعي حدثنا أبو بكر بن عياش عن الأعمش عن إبراهيم عن علقمة
قال رسول الله ﷺ لا يدخل الجنة من كان في قلبه مثقال حبة من خردل من كبر ولا يدخل النار من كان في قلبه مثقال حبة من إيمان
Muslim also recorded it in the Book of Faith, chapter on the prohibition of pride and its explanation, hadith 91, from the hadith of Amash with the same wording.On this subject there are also hadiths from Abu Hurairah [Bukhari, no. 5789, and Muslim, no. 2088], Ibn Abbas [Ibn Majah, no. 4175], Salama bin Akwa [coming up, 2000], and Abu Saeed [Ibn Majah, no. 4176, and Ahmad, 3/40].