بُلُوغُ الْمَرَامِ
Bulugh al-Maram 198
The Book of Prayer
وَلَهُ : عَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -قَالَ : { لَا يُؤَذِّنُ إِلَّا مُتَوَضِّئٌ } وَضَعَّفَهُ أَيْضًا [1] . فَالْحَدِيثُ ضَعِيفٌ مَرْفُوعًا وَمَوْقُوفًا .
He also reported from Abu Hurairah (RA): The Prophet (ﷺ) said: "No one should announce Adhan except the one who has performed the ablution". [Reported by at-Tirmidhi who graded it Da'if (weak)]. So the narration is weak whether Marfu' [reaching back to the Prophet (ﷺ)] or Mawquf (saying of a Companion).
Sunnah.com reference: Book 2, Hadith 60