Narrated Abu Burdah:

On the authority of his father: The Messenger of Allah ﷺ commanded us to proceed to the land of Negus. Mentioning the rest of the tradition he said that Negus said: I bear witness that he is the Messenger of Allah ﷺ, and it is he about whom Christ son of Mary gave good news. It I were not in the land which I am, I would come to him and carry his shoes.

حَدَّثَنَا عَبَّادُ بْنُ مُوسَى، حَدَّثَنَا إِسْمَاعِيلُ، - يَعْنِي ابْنَ جَعْفَرٍ - عَنْ إِسْرَائِيلَ، عَنْ أَبِي إِسْحَاقَ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِيهِ، قَالَ أَمَرَنَا رَسُولُ اللَّهِ ﷺ أَنْ نَنْطَلِقَ إِلَى أَرْضِ النَّجَاشِيِّ فَذَكَرَ حَدِيثَهُ قَالَ النَّجَاشِيُّ أَشْهَدُ أَنَّهُ رَسُولُ اللَّهِ ﷺ وَأَنَّهُ الَّذِي بَشَّرَ بِهِ عِيسَى ابْنُ مَرْيَمَ وَلَوْلاَ مَا أَنَا فِيهِ مِنَ الْمُلْكِ لأَتَيْتُهُ حَتَّى أَحْمِلَ نَعْلَيْهِ .