Everything that hears the Azan will testify

Every jinn, human and thing that hears the muezzin will bear witness for him.

Narrated by Abu Sa'id al-Khudri

No jinn, human or anything else hears the voice of the muezzin, as far as it reaches, except that it will bear witness for him on the Day of Resurrection.

Sahih al-Bukhari 609

What this hadith teaches

The further the call is heard, the more witnesses the muezzin gains.

Reference and grade

Grade
Sahih (in Sahih al-Bukhari)
Narrator
Abu Sa'id al-Khudri

The hadith in Arabic نص الحديث

لاَ يَسْمَعُ مَدَى صَوْتِ الْمُؤَذِّنِ جِنٌّ وَلاَ إِنْسٌ وَلاَ شَىْءٌ إِلاَّ شَهِدَ لَهُ يَوْمَ الْقِيَامَةِ

Arabic text of Sahih al-Bukhari 609, as given on sunnah.com.