It was narrated from Abu Mahdhurah that the Messenger of Allah (S.A.W) taught him the Adhan with nineteen phrases and the Iqamah with seventeen phrases, then Abu Mahdhurah counted them as nineteen and seventeen.
Hadith ReferenceSunan an-Nasa'i / The Book of the Adhan (The Call to Prayer) / Hadith: 631
Hadith Gradingالألبانی:حسن صحيح | زبیر علی زئی:صحيح