Abdullah bin Muhammad bin Abdullah bin Zayd narrates from his father, from his grandfather, Sayyiduna Abdullah bin Zayd (may Allah be pleased with him), who said: I came to the Prophet (peace and blessings be upon him) and told him (peace and blessings be upon him) how I had seen the adhan. He (peace and blessings be upon him) said: "Teach it to Bilal (may Allah be pleased with him), for his voice is stronger than yours." When Bilal (may Allah be pleased with him) gave the adhan, Sayyiduna Abdullah (may Allah be pleased with him) was troubled; the Messenger of Allah (peace and blessings be upon him) ordered him, and he gave the iqamah.
Abu Bakr Ahmad bin Ishaq bin Ayyub al-Faqih used to declare this hadith da'if (weak) for the reason mentioned earlier.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1873