Sahih Muslim 1011
Sahih Muslim · Book 12: The Book of Zakat · Encouragement to give charity before there is no one to accept it
Haritha b. Wahb reported Allah's Messenger (ﷺ) as saying:
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، وَابْنُ، نُمَيْرٍ قَالاَ حَدَّثَنَا وَكِيعٌ ، حَدَّثَنَا شُعْبَةُ ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، - وَاللَّفْظُ لَهُ - حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، عَنْ مَعْبَدِ بْنِ خَالِدٍ ، قَالَ سَمِعْتُ حَارِثَةَ بْنَ وَهْبٍ ، يَقُولُ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " تَصَدَّقُوا فَيُوشِكُ الرَّجُلُ يَمْشِي بِصَدَقَتِهِ فَيَقُولُ الَّذِي أُعْطِيَهَا لَوْ جِئْتَنَا بِهَا بِالأَمْسِ قَبِلْتُهَا فَأَمَّا الآنَ فَلاَ حَاجَةَ لِي بِهَا . فَلاَ يَجِدُ مَنْ يَقْبَلُهَا " .
Give Sadaqa for a time is about to come when a person would walk with alms and the one whom it is to be given would say: Had you brought it yesterday, I would have accepted it. For the present I do not need it. (And the giver of Sadaqa) I would not find anyone to accept it.