It is narrated from Hazrat Jabir (may Allah be pleased with him) that Hazrat Bilal used to give the adhan after the decline of the sun. He did not show any negligence in this, and he would not say the iqamah until he saw the Prophet (peace and blessings be upon him) coming out. When he saw that the Prophet (peace and blessings be upon him) had come out, he would then begin the iqamah.