Qatadah reported: Ibn Umar, may Allah be pleased with him, said, “Verily, the most hateful of servants to Allah is every transgressor, cursing others.”
Source: al-Zuhd wal-Raqā’iq 666
عَنْ قَتَادَةَ قَالَ قَالَ ابْنُ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا إِنَّ أَبْغَضَ عِبَادِ اللَّهِ إِلَى اللَّهِ كُلُّ طَعَّانٍ لَعَّانٍ
666 الزهد والرقائق لابن المبارك
