This hadith has been narrated on the authority of Ibrahim b. Tahman with the same chain of transmitters but with this variation that he said:Both of them made the announcement."
وَحَدَّثَنَاهُ عَبْدُ بْنُ حُمَيْدٍ، حَدَّثَنَا أَبُو عَامِرٍ عَبْدُ الْمَلِكِ بْنُ عَمْرٍو، حَدَّثَنَا إِبْرَاهِيمُ، بْنُ طَهْمَانَ بِهَذَا الإِسْنَادِ غَيْرَ أَنَّهُ قَالَ فَنَادَيَا .
Muslim
The Book of Fasting • Hadith 186