Imam Ali (AS) said:
لَمْ يَكُنْ لِأَحَدٍ فِىَّ مَهْمَزٌ وَ لالِقائلٍ فِىَّ مَغْمَزٌ، الَـذَّلـيلُ عِنْدى عَـزيزٌ حَتّى اخُذَ الْحَـقَّ لَـهُ، وَ الْقَوِىُّ عِنْدى ضَعيفٌ حَتّى اخُذَ الْحَـقَّ مِنْهُ. رَضينا عَنِ اللّه ِ قَـضاءَهُ وَ سَلَّمْنا لِلّه أَمْـرَهُ
The low is dear in my view till I secure (his) right for him while the strong is in my view weak till I take (others’) rights from him. We are happy with the destiny ordained by Allah and have submitted to the command of Allah.       
Nahjul Balagha, Sermon 37  

Seerah of Imam Ali (AS)
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