´It was narrated from Ibn Mas'ud that the Prophet said:` "Bilal calls the Adhan at night to awaken those of you who are asleep, and so that those who are praying Qiyam cam return. Dawn is not when the light appears like this" - and he gestured with his hand - "rather dawn is when it appears like this: - and he gestured with his two forefingers. '
´Samurah said:` "The Messenger of Allah said; 'DO not be confused by the Adhan of Bilal, or by this whiteness, until dawn appears like this" - meaning horizontally. (One of the narrators) Abu Dawud said: "And he spread out his hands gesturing to the right and left."
Hadith Referenceسنن نسائي / كتاب الصيام / 2173
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم