"The Messenger of Allah (S.A.W) said: 'When Ibn Umm Maktum calls the Adhan, eat and drink, and when Bilal calls the Adhan, do not eat nor drink."
Sunan an-Nasa'i Book 7, Hadith 15
← Previous Hadith "The Messenger of Allah (S.A.W) said: 'Bilal calls the Adhan during the night, so eat and drink until Ibn Umm Maktum calls the Adhan." She said: "And there was no more between than the time it takes for one to come down and the other to go up."

Sunan an-Nasa'i Book 7, Hadith 14 Next Hadith → "Bilal calls the Adhan during the night to wake those who are sleeping and so that those who are praying Qiyam can return.

Meaning to finish. Ash-Shawkani said: "To return to sleeping or return to sitting from praying" Nail Al-Awtar.

Indicating with an up and down motion. The true dawn is from right to left.

Sunan an-Nasa'i Book 7, Hadith 16