Hadith Q367

لَا بَعْدَهُ أَبُو بَكْرٍ وَلَا عُمَرُ، كَمَا ادَّعَى بَعْضُ الْجَهَلَةِ أَنَّهُ جَائِزٌ أَنْ يَكُونَ الصِّدِّيقُ أَوِ الْفَارُوقُ أَمَرَ بِلَالًا بِذَلِكَ‏.‏
After the Prophet (peace be upon him), it was not Abu Bakr or Umar (may Allah be pleased with them), as some ignorant people have claimed that it is possible that Abu Bakr as-Siddiq or Umar al-Faruq (may Allah be pleased with them) ordered Bilal (may Allah be pleased with him) to do this.
Hadith Reference صحيح ابن خزيمه / جماع أبواب الأذان والإقامة / Q367