عَنِ الْقَاسِمِ بْنِ أَبِي بَزَّةَ فِي قَوْلِهِ تَبَارَكَ وَتَعَالَى {وَلَا تَمْنُنْ تَسْتَكْثِرْ} [المدثر: 6] قَالَ لَا تُعْطِ شَيْئًا تَطْلُبُ أَكْثَرَ مِنْهُ
Qasim bin Abi Bazah says: The command of Allah Almighty is: {وَلَا تَمْنُنْ تَسْتَکْثِرْ} … And (with this intention) do not do a favor so that you may gain more. The meaning of this verse is that it should not be such that you give something, and then you are seeking more in return.