When the dawn broke, he came down and performed ablution and he then turned to me. In the meantime his Companions joined him. Then Bilal wanted to utter the iqamah, but the Prophet (ﷺ) said to him: The man of Suda' has called the adhan, and he who calls the adhan utters the iqamah.
In-book : Book 2, Hadith 124
English translation : Book 2, Hadith 514