It is narrated from Sayyiduna Samurah bin Jundub (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Do not let the call of Bilal deceive you, nor the whiteness that is seen at the top of the pre-dawn sky (that is, do not let the false dawn deceive you)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6950
Sayyiduna Samurah bin Jundub (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) said: "Do not let the adhan of Bilal deceive you, nor this blackness (darkness), until the dawn breaks forth like this." And he (peace and blessings be upon him) gestured with his hand horizontally.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6951
It is narrated from Sayyiduna Samurah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Do not let the adhan of Bilal, nor the elongated (vertical) dawn, prevent you from (eating) suhur; rather, the true dawn is the one that spreads across the horizon." These are the words of Hajjaj bin Nusayr.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6952
Sayyiduna Samurah bin Jundub (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) said: "Do not let the adhan of Bilal deceive you away from your suhur, nor this whiteness of the dawn, like this" - and he (peace and blessings be upon him) raised both his hands - "until it spreads across the horizon." And he (peace and blessings be upon him) gestured with his hand horizontally.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6953