Abbas asked the Prophet about paying his Sadaqah before it is due, and he granted him permission to do that.  

أَنَّ الْعَبَّاسَ سَأَلَ النَّبِيَّ ﷺ فِي تَعْجِيلِ صَدَقَتِهِ قَبْلَ أَنْ تَحِلَّ فَرَخَّصَ لَهُ فِي ذَلِكَ