The right of him who does a kindly act (dhu l-ma’ruf) toward you is that you thank him and mention his kindness; you reward him with beautiful words and you supplicate for him sincerely in that which is between you and God. If you do that, you have thanked him secretly and openly. Then, if you are able to repay him one day, you repay him.

وَأمّا حَقُّ ذِي المَعْرُوفِ عَلَيكَ فَأَنْ تَشْكُرَهُ وتَذْكُرَ مَعْرُوفَهُ وتَنْشُرَ لَهُ الْمَقَالَةَ الْحَسَنَةَ، وَتُخلِصَ لَهُ الدُّعَاءَ فِيمَا بَينَكَ وبَيْنَ اللَّهِ عز وجل ، فَإنّكَ إذَا فَعَلْتَ ذَلِكَ كُنْتَ قَدْ شَكَرْتَهُ سِرًّا وَعَلانِيَةً. ثُمَّ إنْ قدرت على مكافأته يوماً كافأته