Jabir (RA):
Allah's Messenger (ﷺ) said to Bilal, "When you announce the Adhan, utter deliberately and when you pronounce the Iqamah utter quickly, and leave between your Adhan and your Iqamah time for one who is eating to finish his food."
[Reported by at-Tirmidhi who graded it Da'if (weak)].