[Machine] "He (someone) came to the Prophet ﷺ holding a ring in his hand. The Prophet ﷺ asked him, 'What is this ring?' He replied, 'It is a ring that I have obtained.' The Prophet ﷺ said, 'Throw it away.' So, I threw it towards him, and then it turned out to be an iron ring. The Prophet ﷺ asked, 'What did you engrave on it?' I replied, 'Muhammad, Rasul Allah (Muhammad, the Messenger of Allah).' The Prophet ﷺ took it and used it as his seal until he passed away. It was the ring that was in his hand. (Narrated by Yahya al-Hamani, considered weak)"  

أَنَّهُ أَتَى النَّبِيَّ ﷺ وَفِي يَدِهِ خَاتَمٌ فَقَالَ لَهُ النَّبِيُّ ﷺ «مَا هَذَا الْخَاتَمُ؟» فَقَالَ خَاتَمٌ اتَّخَذْتُهُ قَالَ «فَاطْرَحْهُ» فَطَرَحْتُهُ إِلَيْهِ فَإِذَا هُوَ خَاتَمٌ مِنْ حَدِيدٍ فَقَالَ النَّبِيُّ ﷺ «مَا نَقَشْتَهُ؟» قُلْتُ مُحَمَّدٌ رَسُولُ اللَّهِ فَأَخَذَهُ النَّبِيُّ ﷺ فَتَخَتَّمَ بِهِ حَتَّى مَاتَ فَهُوَ الْخَاتَمُ الَّذِي كَانَ فِي يَدِهِ «صَحِيحُ الْإِسْنَادِ وَلَمْ يُخَرِّجَاهُ» يحيى الحماني ضعيف  

"عَنْ خَالِدِ بْنِ سَعِيدٍ قال: أتيتُ النَّبِىَّ ﷺ وَفِى يَدِى خَاتَمٌ، فقالَ: يَا خَالدُ! ما هَذَا الخَاتَمُ؟ قُلْتُ: خَاتَمٌ اتَّخَذتُهُ، قَالَ: فَاطْرحْهُ إِلَىَّ، فَطَرَحْتُهُ إِلَيْهِ فَإِذَا هُوَ خَاتَمٌ مِنْ حديدٍ ملوى عَلَيْهِ فِضَّةٌ، فَقَالَ النَّبِىُّ ﷺ : مَا نَقْشُهُ؟ قُلتُ: محمدٌ رَسُولُ اللهِ. فَأَخَذَهُ النبِىُّ ﷺ فَلَبِسَهُ، فَهُو الْخَاتَمُ الَّذِى كَانَ فِى يَدِهِ".