حَدَّثَنَا عَلِيُّ بْنُ الْجَعْدِ أَخْبَرَنَا شُعْبَةُ عَنْ قَتَادَةَ قَالَ سَمِعْتُ أَنَسًا رَضِيَ اللَّهُ عَنْهُ يَقُولُ لَمَّا أَرَادَ النَّبِيُّ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ يَکْتُبَ إِلَی الرُّومِ قِيلَ لَهُ إِنَّهُمْ لَا يَقْرَئُونَ کِتَابًا إِلَّا أَنْ يَکُونَ مَخْتُومًا فَاتَّخَذَ خَاتَمًا مِنْ فِضَّةٍ فَکَأَنِّي أَنْظُرُ إِلَی بَيَاضِهِ فِي يَدِهِ وَنَقَشَ فِيهِ مُحَمَّدٌ رَسُولُ اللَّهِ
صحیح بخاری · Hadith 2938
Narrated Anas: When the Prophet intended to write a letter to the ruler of the Byzantines, he was told that those people did not read any letter unless it was stamped with a seal. So, the Prophet got a silver ring-- as if I were just looking at its white glitter on his hand ---- and stamped on it the expression "Muhammad, Apostle of Allah".
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020