Sahih al-Bukhari 6034
Sahih al-Bukhari · Book 78: Good Manners and Form (Al-Adab) · Good character, generosity, and miserliness
Narrated Jabir:
حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ ، أَخْبَرَنَا سُفْيَانُ ، عَنِ ابْنِ الْمُنْكَدِرِ ، قَالَ سَمِعْتُ جَابِرًا ـ رضى الله عنه ـ يَقُولُ مَا سُئِلَ النَّبِيُّ صلى الله عليه وسلم عَنْ شَىْءٍ قَطُّ فَقَالَ لاَ.
Never was the Prophet (ﷺ) asked for a thing to be given for which his answer was 'no'.