From Sahih Bukhari (Hadith 1022):
Narrated 'Abdullah bin Yazid Al-Ansari that he went out with Al-Bara' bin 'Azib, and Zaid bin Arqam and invoked for rain. He ('Abdullah bin Yazid) stood up but not on a pulpit and invoked Allah for rain and then offered two Rak'a prayers with loud recitation without pronouncing Adhan or Iqama. Abu Ishaq said that 'Abdullah bin Yazid had seen the Prophet (ﷺ) (doing the same)
Reference: Bukhari 1022