"A man exited the Masjid after the Adhan for Asr had been called. So Abu Hurairah said: 'As for this person, he has indeed disobeyed Abul Qasim."
Jami` at-Tirmidhi Book 2, Hadith 56
← Previous Hadith the Prophet said: "Indeed Bilal calls the Adhan in the night, so eat and drink until you hear the Adhan of Ibn Umm Maktum."

Jami` at-Tirmidhi Book 2, Hadith 55 Next Hadith → "A cousin of mine and I arrived as guests of Allah's Messenger. He said to us: 'When you travel then call the Adhan and Iqamah and let the eldest of you lead the prayer.'"

Jami` at-Tirmidhi Book 2, Hadith 57