Sunan an-Nasa'i
Sunan an-Nasa'i 2593
أَخْبَرَنَا الْحُسَيْنُ بْنُ حُرَيْثٍ، قَالَ أَنْبَأَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ وَهْبِ بْنِ مُنَبِّهٍ، عَنْ أَخِيهِ، عَنْ مُعَاوِيَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ تُلْحِفُوا فِي الْمَسْأَلَةِ وَلاَ يَسْأَلْنِي أَحَدٌ مِنْكُمْ شَيْئًا وَأَنَا لَهُ كَارِهٌ فَيُبَارَكُ لَهُ فِيمَا أَعْطَيْتُهُ " .
Al-Husayn ibn Hurayth reported: Sufyan informed us, from Amr, from Wahb ibn Munabbih, from his brother, from Muawiyah, that the Messenger of Allah ﷺ said: Do not be insistent in asking. None of you should ask me for something when I am reluctant to give it to him, then expect blessing in what I give him.
Translation notes
The source links insistence in asking with receiving something from the Prophet while he is reluctant; the warning about blessing is retained.