حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ أَبُو عَمْرٍو، قَالَ: حَدَّثَنَا نُوحُ بْنُ قَيْسٍ، عَنْ خَالِدِ بْنِ قَيْسٍ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَتَبَ إِلَى كِسْرَى وَقَيْصَرَ وَالنَّجَاشِيِّ، فَقِيلَ لَهُ: إِنَّهُمْ لا يَقْبَلُونَ كِتَابًا، إِلا بِخَاتَمٍ، فَصَاغَ رَسُولُ اللهِ صلى الله عليه وسلم، خَاتَمًا حَلْقَتُهُ فِضَّةٌ، وَنُقِشَ فِيهِ: مُحَمَّدٌ رَسُولُ اللهِ.
Anas ibn Malik said:
"The Prophet (Allah bless him and give him peace) wrote to Chosroes, Caesar and the Negus, whereupon he was told: 'The non-Arabs will not accept a letter unless it bears a seal.' Allah’s Messenger (Allah bless him and give him peace) therefore cast a signet which had a silver ring, and on which was engraved; “Muhammad is the Messenger of Allah.”
Reported by Al-Bukhari (No. 65, 2938, 5875, 7162), Muslim (No. 2092c, 2092d, 2092e), Abu Dawud (No. 4214), An-Nasa’i (No. 5201, 5278) and Ahmad (No. 12259, 12277, 12399, 12573, 12849, 13407). Cited in Ash-Shama'il al-Muhammadiyya (No. 91).