It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he said: "I gave glad tidings to Sayyiduna Bilal (may Allah be pleased with him), and he asked me: O Abdullah, what are you giving me glad tidings of? I said: I heard the Messenger of Allah (peace and blessings be upon him) say: 'Bilal will come on the Day of Resurrection riding a mount of gold whose reins are of pearls and rubies. With him will be a banner, and the mu'adhdhins will follow behind it, and he will enter them into Paradise, until he will even take (into Paradise) the one who gave the adhan for forty days for the sake of Allah, the Mighty and Majestic.'"
Hadith Referenceالمعجم الأوسط / باب العين / 4474
Hadith Gradingمحدثین:إسناده ضعيف لضعف خالد بن إسماعيل المخزومي
Hadith Takhrij«قال الهيثمي: فيه خالد بن إسماعيل المخزومي وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 9، ص 300»» «أخرجه الطبراني فى «الصغير» برقم: 623»