" لاَ تُلْحِفُوا فِي الْمَسْأَلَةِ وَلاَ يَسْأَلْنِي أَحَدٌ مِنْكُمْ شَيْئًا وَأَنَا لَهُ كَارِهٌ فَيُبَارَكُ لَهُ فِيمَا أَعْطَيْتُهُ "
It was narrated from Mu'awiyah that the Messenger of Allah said: "Do not be demanding when asking. If one of you asks me for anything and I give it reluctantly, there will be no blessing in it."