ENOfficial
Abu Mahdhura said that the Prophet (ﷺ) taught him the adhan as consisting of nineteen words, and the iqama as consisting of seventeen words. Ahmad, Tirmidhi, Abu Dawud, Nasa’i, Darimi and Ibn Majah transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي مَحْذُورَةَ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَّمَهُ الْأَذَانَ تِسْعَ عَشْرَةَ كَلِمَةً وَالْإِقَامَةَ سَبْعَ عَشْرَةَ كَلِمَةً. رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ وَأَبُو دَاوُدَ وَالنَّسَائِيُّ وَالدَّارِمِيُّ وَابْنُ مَاجَهْ
sunnah.com