Hadith 151B4

وَسُئِلَ مَالِك ، عَنْ تَسْلِيمِ الْمُؤَذِّنِ عَلَى الْإِمَامِ وَدُعَائِهِ إِيَّاهُ لِلصَّلَاةِ وَمَنْ أَوَّلُ مَنْ سُلِّمَ عَلَيْهِ؟ فَقَالَ: لَمْ يَبْلُغْنِي أَنَّ التَّسْلِيمَ كَانَ فِي الزَّمَانِ الْأَوَّلِ
Imam Malik, may Allah have mercy on him, was asked whether after the adhan the muezzin should greet the leader with salam and call him to prayer, and who is the person whom the muezzin first greeted with salam. Imam Malik, may Allah have mercy on him, replied: I have not received any information that in the earliest times the muezzin used to greet the leader with salam first.
Hadith Reference موطا امام مالك رواية يحييٰ / كتاب الصلاة / 151B4
Hadith Takhrij «شركة الحروف نمبر: 140، فواد عبدالباقي نمبر: 3 - كِتَابُ الصَّلَاةِ-ح: 7»