I saw the Messenger of Allah ﷺ after he had completed (the prayer) and there was a trace of clay on his forehead and tip (of the nose).

عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ بِهَذَا الإِسْنَادِ نَحْوَهُ وَفِي حَدِيثِهِمَا رَأَيْتُ رَسُولَ اللَّهِ ﷺ حِينَ انْصَرَفَ وَعَلَى جَبْهَتِهِ وَأَرْنَبَتِهِ أَثَرُ الطِّينِ