Arabic (Original)
حَدَّثَنَا حَجَّاجٌ حَدَّثَنَا لَيْثٌ حَدَّثَنَا عُقَيْلٌ عَنِ ابْنِ شِهَابٍ عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ عَنِ ابْنِ عَبَّاسٍ أَنَّهُ قَالَ شَرِبَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَبَنًا ثُمَّ دَعَا بِمَاءٍ فَمَضْمَضَ ثُمَّ قَالَ إِنَّ لَهُ دَسَمًا.
English Translation
The Messenger of Allah (peace be upon him) said: 'Whoever makes an advance payment (salam), let him do so for a known measure, a known weight, and a known term.'