His father said: "I asked Ibn 'Abbas how the Messenger of Allah ﷺ prayed for rain. He said: 'The Messenger of Allah ﷺ went out (dressed) in a state of humility, beseeching and humble. He sat on the minbar but he did not deliver a Khutbah like this Khutbah of yours, rather he kept supplicating, beseeching and saying the takbir, and he prayed two rak'ahs as he used to do during the two 'Eids.'" (Using translation from Nasāʾī 1508)  

عَنْ صَلَاةِ رَسُولِ اللهِ ﷺ فِي الِاسْتِسْقَاءِ فَقَالَ خَرَجَ رَسُولُ اللهِ ﷺ «مُتَبَذِّلًا مُتَوَاضِعًا مُتَضَرِّعًا فَجَلَسَ عَلَى الْمِنْبَرِ فَلَمْ يَخْطُبْ خُطْبَتَكُمْ هَذِهِ وَلَكِنْ لَمْ يَزَلْ فِي الدُّعَاءِ وَالتَّضَرُّعِ وَالتَّكْبِيرِ وَصَلَّى رَكْعَتَيْنِ كَمَا كَانَ يُصَلِّي فِي الْعِيدِ»