That the Messenger of Allah told 'Attab bin Usaid to estimate the (harvest of) grapes, and to pay Zakah in raisins, just as the Zakah on date palms is given in died dates. (Using translation from Nasāʾī 2618)
أَنَّ رَسُولَ اللهِ ﷺ أَمَرَ عَتَّابَ بْنَ أَسِيدٍ أَنْ يَخْرُصَ الْعِنَبَ كَمَا يَخْرُصُ النَّخْلَ ثُمَّ تُؤَدِّي زَكَاتَهُ زَبِيبًا كَمَا تُؤَدِّي زَكَاةَ النَّخْلِ تَمْرًا قَالَ فَتِلْكَ سُنَّةُ رَسُولِ اللهِ ﷺ فِي النَّخْلِ وَالْعِنَبِ