"I saw the Prophet ﷺ praying sitting down and I said: 'I was told that you said that the prayer of one who is sitting down is worth half of the prayer of the one who is standing up.' He said: 'Yes indeed, but I am not like any one of you.'" (Using translation from Nasāʾī 1659)  

رَأَيْتُ النَّبِيَّ ﷺ يُصَلِّي جَالِسًا فَقُلْتُ حُدِّثْتُ أَنَّكَ قُلْتَ إِنَّ صَلَاةَ الْقَاعِدِ عَلَى النِّصْفِ مِنْ صَلَاةِ الْقَائِمِ وَأَنْتَ تُصَلِّي قَاعِدًا قَالَ «أَجَلْ وَلَكِنِّي لَسْتُ كَأَحَدٍ مِنْكُمْ»