Hadith 5107
وَعَنِ ابْنِ مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا يَدْخُلُ النَّارَ أحد فِي قلبه مِثْقَال حَبَّة خَرْدَلٍ مِنْ إِيمَانٍ. وَلَا يَدْخُلُ الْجَنَّةَ أَحَدٌ فِي قَلْبِهِ مِثْقَالُ حَبَّةٍ مِنْ خَرْدَلٍ مِنْ كبر» . رَوَاهُ مُسلم
Ibn Mas'ud, may Allah be pleased with him, narrates that the Messenger of Allah, peace and blessings be upon him, said: "Whoever has faith equal to a mustard seed in his heart will not enter Hell, and whoever has arrogance equal to a mustard seed in his heart will not enter Paradise." Narrated by Muslim.