أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ مَعْبَدِ بْنِ خَالِدٍ، عَنْ حَارِثَةَ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏"‏ تَصَدَّقُوا فَإِنَّهُ سَيَأْتِي عَلَيْكُمْ زَمَانٌ يَمْشِي الرَّجُلُ بِصَدَقَتِهِ فَيَقُولُ الَّذِي يُعْطَاهَا لَوْ جِئْتَ بِهَا بِالأَمْسِ قَبِلْتُهَا فَأَمَّا الْيَوْمَ فَلاَ ‏"‏ ‏.‏

It was narrated that Harithah said: "I heard the Messenger of Allah (PBUH) say: 'Give charity, for there will come a time when a man will walk about with his charity, and the one to whom he wants to give it will say: If you had brought ityesterday I would have accepted it, but today (I have no need of it)." Translation Not Available

Book Ref: Sunan An Nisai Book 23 Hadith 2555
Web Ref:  Sunan An Nisai Vol 1 Book 23 Hadith 2556