This tradition has also been transmitted by Sufyan through a different chain of narrators. This version has:
He raised his hands once in the beginning. Some narrated: (raised his hands) once only.

حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ، حَدَّثَنَا مُعَاوِيَةُ، وَخَالِدُ بْنُ عَمْرٍو، وَأَبُو حُذَيْفَةَ قَالُوا حَدَّثَنَا سُفْيَانُ، بِإِسْنَادِهِ بِهَذَا قَالَ فَرَفَعَ يَدَيْهِ فِي أَوَّلِ مَرَّةٍ وَقَالَ بَعْضُهُمْ مَرَّةً وَاحِدَةً .