The Messenger of Allah ﷺ sat him down and taught him the call to prayer word by word.Ibrahim said, "Just like our call to prayer."Bishr said, "I asked him to repeat it for me, and he described the call to prayer with repetition."
حدثنا بشر بن معاذ البصري حدثنا إبراهيم بن عبد العزيز بن عبد الملك بن أبي محذورة قال أخبرني أبي وجدي جميعا
أن رسول الله ﷺ أقعده وألقى عليه الأذان حرفا حرفا قال إبراهيم مثل أذاننا قال بشر فقلت له أعد علي فوصف الأذان بالترجيع
[Its isnad is hasan, and it is preserved] * Nasai narrated it: 4/2, no. 630, from Bishr bin Muaz through the same chain, but with him it reads "Allah is greatest, Allah is greatest" twice, not four times, and this is shadhdh.