حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، أَخْبَرَنَا مُعَاذُ بْنُ هِشَامٍ، حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ لَمَّا أَرَادَ نَبِيُّ اللَّهِ صلى الله عليه وسلم أَنْ يَكْتُبَ إِلَى الْعَجَمِ قِيلَ لَهُ إِنَّ الْعَجَمَ لاَ يَقْبَلُونَ إِلاَّ كِتَابًا عَلَيْهِ خَاتَمٌ فَاصْطَنَعَ خَاتَمًا . قَالَ فَكَأَنِّي أَنْظُرُ إِلَى بَيَاضِهِ فِي كَفِّهِ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
"When the Prophet of Allah (ﷺ) wanted to write to the foreigners, it was said to him: 'The foreigners do not accept a letter unless it has a seal.' So he had a ring made." He said: "It is as if I am now looking at its whiteness in his hand."
Source: Jami` at-Tirmidhi — repository translation · Imam Abu Isa Muhammad ibn Isa al-Tirmidhi — authenticity/grade metadata requires independent source review · Sunnah.comAudio not available for the selected reciter.
Source: Jami` at-Tirmidhi — repository arabic · Imam Abu Isa Muhammad ibn Isa al-Tirmidhi · Sunnah.com