Hadithcore
Musnad Ahmad, 822
hasan· Darussalam

It was narrated from ‘Ali that Al-`Abbas bin `Abdul-Muttalib asked the Prophet (ﷺ) about paying zakah in advance and he gave him a concession allowing him to do that.

حَدَّثَنَا سَعِيدُ بْنُ مَنْصُورٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ زَكَرِيَّا، عَنْ حَجَّاجِ بْنِ دِينَارٍ، عَنِ الْحَكَمِ، عَنْ حُجَيَّةَ بْنِ عَدِيٍّ، عَنْ عَلِيٍّ، أَنَّ الْعَبَّاسَ بْنَ عَبْدِ الْمُطَّلِبِ، سَأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي تَعْجِيلِ صَدَقَتِهِ قَبْلَ أَنْ تَحِلَّ فَرَخَّصَ لَهُ‏.‏

References1 variant
In-Book Reference
Book 5, Hadith 252