[Machine] Umair ibn al-Khattab Q said, "I passed by the Prophet's Mosque and performed one unit of prayer, then I left. A man followed him and said, 'O leader of the believers, you only prayed one unit.' He said, 'It was voluntary prayer, so whoever wishes may increase and whoever wishes may decrease.'"
قَالَ مَرَّ عُمَرُ بْنُ الْخَطَّابِ ؓ فِي مَسْجِدِ النَّبِيِّ ﷺ فَرَكَعَ رَكْعَةً وَاحِدَةً ثُمَّ انْطَلَقَ فَلَحِقَهُ رَجُلٌ فَقَالَ يَا أَمِيرَ الْمُؤْمِنِينَ مَا رَكَعْتَ إِلَّا رَكْعَةً وَاحِدَةً قَالَ هُوَ التَّطَوُّعُ فَمَنْ شَاءَ زَادَ وَمَنْ شَاءَ نَقَصَ