The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship
Ṣaḥīḥ Muslim 6596
يَا عَائِشَةُ إِنَّ شَرَّ النَّاسِ مَنْزِلَةً عِنْدَ اللَّهِ يَوْمَ الْقِيَامَةِ مَنْ وَدَعَهُ أَوْ تَرَكَهُ النَّاسُ اتِّقَاءَ فُحْشِهِ
yā ʿāʾishah inna sharra an-nāsi manzilatan ʿinda-Llāh yawma al-qiyāmah man wadaʿah aw tarakah an-nāsu āttiqāʾa fuḥshihi
Transliteration generated from the Arabic vowel marks
The full narration
A'isha reported that a person sought permission from Allah's Apostle (ﷺ) to see him. He said:Grant him permission. (and also added: ) He is a bad son of his tribe or he is a bad person of his tribe. When he came in he used kind words for him. 'A'isha reported that she said: Allah's Messenger, you said about him what you had to say and then you treated him with kindness. He said: A'isha, verily in the eye of Allah, worst amongst the person in rank on the Day of Resurrection is one whom the people abandon or desert out of the fear of indecency
Source
Ṣaḥīḥ Muslim · 6596