The Prophet ﷺ said: At the end of time there will be people who will use this black dye like the crops of doves who will not experience the fragrance of Paradise.  

قَالَ رَسُولُ اللَّهِ ﷺ يَكُونُ قَوْمٌ يَخْضِبُونَ فِي آخِرِ الزَّمَانِ بِالسَّوَادِ كَحَوَاصِلِ الْحَمَامِ لاَ يَرِيحُونَ رَائِحَةَ الْجَنَّةِ