Umar II on Curses: He curses his oppressor until he is even worse

Ribah ibn ‘Ubaydah reported: I was sitting with Umar ibn Abdul Aziz, may Allah have mercy on him, when the ruler Al-Hajjaj was mentioned, so I reviled and denounced him. Umar said, “Calm down, O Ribah! Verily, I have heard that a man might be oppressed with a great wrong, and he continues to revile and belittle his oppressor until he forfeits his right and he owes his oppressor even more.”

Source: al-Zuhd wal-Raqā’iq 667

عن رَبَاح بْن عُبَيْدَة قَالَ كُنْتُ قَاعِدًا عِنْدَ عُمَرَ بْنِ عَبْدِ الْعَزِيزِ رحمه الله فَذُكِرَ الْحَجَّاجُ فَشَتَمْتُهُ وَوَقَعْتُ فِيهِ فَقَالَ عُمَرُ مَهْلا يَا رَبَاحُ إِنَّهُ بَلَغَنِي أَنَّ الرَّجُلَ لَيُظْلَمُ بِالْمَظْلَمَةِ فَلا يَزَالُ الْمَظْلُومُ يَشْتِمُ الظَّالِمَ وَيَنْتَقِصُهُ حَتَّى يَسْتَوْفِيَ حَقَّهُ فَيكُونُ لِلظَّالِمِ عَلَيْهِ الْفَضْلُ

667 الزهد والرقائق لابن المبارك