Sunan Ibn Majah 59
سنن ابن ماجه#59SahihIt was narrated that Abdullah said:"The Messenger of Allah (ﷺ) said: 'No one will enter Paradise who has even a mustard-seed's weight of arrogance in his heart, and no one will enter Hell who has even a mustard-seed's weight of faith in his heart
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim