Sahih Muslim
Sahih Muslim 1774 c
The Prophet (saws) wrote to the Kings of the Kuffar, inviting them to Islam
Arabic hadith text
وَحَدَّثَنِيهِ نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ، أَخْبَرَنِي أَبِي، حَدَّثَنِي خَالِدُ بْنُ قَيْسٍ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، وَلَمْ يَذْكُرْ وَلَيْسَ بِالنَّجَاشِيِّ الَّذِي صَلَّى عَلَيْهِ النَّبِيُّ صلى الله عليه وسلم
Translation
It has been narrated on the authority of the same narrator through another chain of transmitters with the same difference in the wording.