The Book Concerning the Use of Correct Words
حَدَّثَنَا حَجَّاجُ بْنُ الشَّاعِرِ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ أَيُّوبَ، عَنِ ابْنِ، سِيرِينَ عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يَسُبُّ أَحَدُكُمُ الدَّهْرَ فَإِنَّ اللَّهَ هُوَ الدَّهْرُ وَلاَ يَقُولَنَّ أَحَدُكُمْ لِلْعِنَبِ الْكَرْمَ . فَإِنَّ الْكَرْمَ الرَّجُلُ الْمُسْلِمُ " .Abu Huraira reported Allah's Messenger (ﷺ) as saying:None of you should abuse Time for it is Allah Who is the Time, and none of you should call 'Inab (grape) as al-karm, for karm is a Muslim person
From Sahih Muslim, whose reports the scholars accept as authentic.