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).
Sahih Muslim Book 13, Hadith 48
← Previous Hadith The dawn is not like it, as one says (and he lifted his hand) till he (dispersed his fingers) and said: It is like this.

Sahih Muslim Book 13, Hadith 47 Next Hadith → This hadith has been narrated on the authority of Sulaiman Taimi with the same chain of transmitters and, at the end, it was said that the first Adhan was meant to awaken those who were in slumber amongst them and in order to make them turn who stand in (prayer) among them (towards food at the commencement of the fast). Jarir (one of the narrators) said that the Messenger (ﷺ) did not say like this but he said like it (true dawn) that the streaks of (true dawn ) are horizontal and not vertical.

Sahih Muslim Book 13, Hadith 49