و درود خدا بر او فرمود: ناسپاسی مردم تو را از کار نیکو باز ندارد، زیرا هستند کسانی، بی آنکه از تو سودی برند تو را می ستایند، چه بسا ستایش… Amir al-Mu'minin,peace be upon him, said: If someone is not grateful to you, that should not prevent you from good actions,because…

وَ قَالَ (عليه السلام): لَا يُزَهِّدَنَّكَ فِي الْمَعْرُوفِ مَنْ لَا يَشْكُرُهُ لَكَ فَقَدْ يَشْكُرُكَ عَلَيْهِ مَنْ لَا يَسْتَمْتِعُ بِشَيْءٍ مِنْهُ وَ قَدْ تُدْرِكُ مِنْ شُكْرِ الشَّاكِرِ أَكْثَرَ مِمَّا أَضَاعَ الْكَافِرُ وَ اللَّهُ يُحِبُّ الْمُحْسِنِينَ

Amir al-Mu'minin,peace be upon him, said: If someone is not grateful to you, that should not prevent you from good actions,because (possibly) such a person will feel grateful about it who has not even drawn any benefit from it, and his gratefulness will be more than the ingratitude of the denier; And Allah Loves those who do good.(Qur an, 3:134,148; 5:93)

Source: Nahj al-Balagha, compiled by al-Sharif al-Radi. Persian: ترجمه محمد دشتی (Mohammad Dashti). English: Translation by Sayed Ali Reza (letters, sayings and sermons 1–16). Text from github.com/WWGTX/NahjulBalaghah. · Free for non-commercial religious use, with attribution