This hadith has been narrated by Sulaiman al-Taimi with the same chain of transmitters (but with a slight variation of words) that he (the Prophet) said:

The dawn is not like it as it is said; he then gathered his fingers and lowered them. But he said, it is like this (and he placed the index finger upon the other one and spread his hand).

حَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبُو خَالِدٍ، - يَعْنِي الأَحْمَرَ - عَنْ سُلَيْمَانَ التَّيْمِيِّ، بِهَذَا الإِسْنَادِ غَيْرَ أَنَّهُ قَالَ ‏"‏ إِنَّ الْفَجْرَ لَيْسَ الَّذِي يَقُولُ هَكَذَا ‏"‏ ‏.‏ وَجَمَعَ أَصَابِعَهُ ثُمَّ نَكَسَهَا إِلَى الأَرْضِ ‏"‏ وَلَكِنِ الَّذِي يَقُولُ هَكَذَا ‏"‏ ‏.‏ وَوَضَعَ الْمُسَبِّحَةَ عَلَى الْمُسَبِّحَةِ وَمَدَّ يَدَيْهِ ‏.‏