"I entered upon the Messenger of Allah ﷺ while there was a scribe in front of him, and I heard him saying: 'Put the pen on your ear, for that is more conducive to the scribe remembering.'"  

دَخَلْتُ عَلَى رَسُولِ اللَّهِ ﷺ وَبَيْنَ يَدَيْهِ كَاتِبٌ فَسَمِعْتُهُ يَقُولُ ضَعِ الْقَلَمَ عَلَى أُذُنِكَ فَإِنَّهُ أَذْكَرُ لِلْمُمْلِي