I saw the Messenger of Allah ﷺ that he kissed Uthman ibn Maz'un while he was dead, and I saw that tears were flowing (from his eyes).  

رَأَيْتُ رَسُولَ اللَّهِ ﷺ يُقَبِّلُ عُثْمَانَ بْنَ مَظْعُونٍ وَهُوَ مَيِّتٌ حَتَّى رَأَيْتُ الدُّمُوعَ تَسِيلُ