Nahj al-Balāgha
Hadith 1938وَلَا تَيْأَسَنَّ لِشَرِّ هَذِهِ الْأُمَّةِ مِنْ رَوْحِ اَللَّهِ لِقَوْلِهِ تَعَالَى: ﴿إِنَّهُ لَا يَيْأَسُ مِن رَّوْحِ اللهِ إِلَّا الْقَوْمُ الْكَافِرُونَ﴾.
Again, do not lose hope even for the worst man of the community because Allāh, the Sublime says : Verily, despairs not of Allāh’s mercy but the disbelieving people. (Qur’ān, 12:87).