Narrated Shurahbil bin As-Samt:

"O Ka'b bin Murrah! Relate (something) to is from the Messenger of Allah ﷺ, and be cautious. He said: 'I heard the Prophet ﷺ say: "Whoever develops some gray hair in Islam, it shall be a light from him on the Day of Judgement."

[Abu 'Eisa said:] There is something on this topic from Fadalah bin 'Ubaid and 'Abdullah bin 'Amr. The narration of Ka'b bin Murrah was reported like this from Al-A'mash, from 'Amr bin Murrah.

This Hadith is been reported from Mansur, from Salim bin Abu Al-Ja'd, and he included a man between him and between Ka'b bin Murrah in the chain. He is called: "Ka'b bin Murrah," and he is called: "Murrah bin Ka'b Al-Bahzi," and the one known among the Companions of the Prophet ﷺ is Ka'b bin Murrah Al-Bahzi, he reported some Ahadith from the Prophet ﷺ.

حَدَّثَنَا هَنَّادٌ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ عَمْرِو بْنِ مُرَّةَ، عَنْ سَالِمِ بْنِ أَبِي الْجَعْدِ، أَنَّ شُرَحْبِيلَ بْنَ السِّمْطِ، قَالَ يَا كَعْبُ بْنَ مُرَّةَ حَدِّثْنَا عَنْ رَسُولِ اللَّهِ ﷺ وَاحْذَرْ . قَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ " مَنْ شَابَ شَيْبَةً فِي الإِسْلاَمِ كَانَتْ لَهُ نُورًا يَوْمَ الْقِيَامَةِ " .

قَالَ أَبُو عِيسَى وَفِي الْبَابِ عَنْ فَضَالَةَ بْنِ عُبَيْدٍ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو . وَحَدِيثُ كَعْبِ بْنِ مُرَّةَ حَدِيثٌ حَسَنٌ . هَكَذَا رَوَاهُ الأَعْمَشُ عَنْ عَمْرِو بْنِ مُرَّةَ وَقَدْ رُوِيَ هَذَا الْحَدِيثُ عَنْ مَنْصُورٍ عَنْ سَالِمِ بْنِ أَبِي الْجَعْدِ وَأَدْخَلَ بَيْنَهُ وَبَيْنَ كَعْبِ بْنِ مُرَّةَ فِي الإِسْنَادِ رَجُلاً . وَيُقَالُ كَعْبُ بْنُ مُرَّةَ وَيُقَالُ مُرَّةُ بْنُ كَعْبٍ الْبَهْزِيُّ وَالْمَعْرُوفُ مِنْ أَصْحَابِ النَّبِيِّ ﷺ مُرَّةُ بْنُ كَعْبٍ الْبَهْزِيُّ وَقَدْ رَوَى عَنِ النَّبِيِّ ﷺ أَحَادِيثَ .