"While we were in the masjid on Friday and the Messenger of Allah ﷺ was addressing the people, a man stood up and said: 'O Messenger of Allah, the routes have been cut off, our wealth has been destroyed and prices have gone up. Pray to Allah (SWT) to give us rain.' So the Messenger of Allah ﷺ raised his hands in level with his face and said: 'O Allah, give us rain.' By Allah (SWT), the Messenger of Allah ﷺ had not come down from the minbar before it started to pour with rain, and it rained from that day until the following Friday. Then a man stood up- I do not know if he was the same man who had asked the Messenger of Allah ﷺ to pray for rain for us or not- and said: 'O Messenger of Allah, the routes have been cut off, and our wealth has been destroyed because there is too much water. Pray to Allah (SWT ) to stop the rain for us.' The Messenger of Allah ﷺ said: 'O Allah, around us and not on us, rather on the mountains and places where trees grow.' By Allah, hardly had the Messenger of Allah ﷺ spoken these words than the clouds split apart (and vanished) until we could not see anything of them.'" (Using translation from Nasāʾī 1515)  

أَنَّهُ سَمِعَهُ يَقُولُ بَيْنَا نَحْنُ فِي الْمَسْجِدِ يَوْمَ الْجُمُعَةِ وَرَسُولُ اللهِ ﷺ يَخْطُبُ النَّاسَ فَقَامَ رَجُلٌ فَقَالَ يَا رَسُولَ اللهِ تَقَطَّعَتِ السُّبُلُ وَهَلَكَتِ الْأَمْوَالُ وَأَجْدَبَتِ الْبِلَادُ فَادْعُ اللهَ أَنْ يَسْقِيَنَا فَرَفَعَ رَسُولُ اللهِ ﷺ يَدَيْهِ حِذَاءَ وَجْهِهِ فَقَالَ «اللهُمَّ اسْقِنَا» فَوَاللهِ مَا نَزَلَ رَسُولُ اللهِ ﷺ عَنِ الْمِنْبَرِ حَتَّى أُوسِعْنَا مَطَرًا وَأُمْطِرْنَا ذَلِكَ الْيَوْمَ حَتَّى الْجُمُعَةِ الْأُخْرَى فَقَامَ رَجُلٌ لَا أَدْرِي أَهُوَ الَّذِي قَالَ يَا رَسُولَ اللهِ اسْتَسْقِ لَنَا أَمْ لَا فَقَالَ يَا رَسُولَ اللهِ تَقَطَّعَتِ السُّبُلُ وَهَلَكَتِ الْأَمْوَالُ مَنْ كَثْرَةِ الْمَاءِ فَادْعُ اللهَ أَنْ يُمْسِكَ عَنَّا الْمَاءَ فَقَالَ رَسُولُ اللهِ ﷺ «اللهُمَّ حَوَالَيْنَا وَلَا عَلَيْنَا وَلَكِنِ الْجِبَالُ وَمَنَابِتُ الشَّجَرِ» قَالَ وَاللهِ مَا هُوَ إِلَّا أَنْ تَكَلَّمَ رَسُولُ اللهِ ﷺ بِذَلِكَ تَمَزَّقَ السَّحَابُ حَتَّى مَا نَرَى مِنْهُ شَيْئًا  

It was narrated from Anas bin Malik that the Prophet ﷺ did not raise his hands in any of his supplications except when praying for rain (Istisqa’), when he raised his hands so high that the whiteness of his armpits could be seen. (Using translation from Ibn Mājah 1180)  

أَنَّ نَبِيَّ اللهِ ﷺ «كَانَ لَا يَرْفَعُ يَدَيْهِ فِي شَيْءٍ مِنْ دُعَائِهِ إِلَّا عِنْدَ الِاسْتِسْقَاءِ فَإِنَّهُ كَانَ يَرْفَعُ يَدَيْهِ حَتَّى يُرَى بَيَاضُ إِبْطَيْهِ»  

He saw the Messenger of Allah at Ahjar Az-Zait praying for rain and raising his hands, making supplications. (Using translation from Nasāʾī 1514)  

أَنَّهُ «رَأَى رَسُولَ اللهِ ﷺ عِنْدَ أَحْجَارِ الزَّيْتِ يَسْتَسْقِي وَهُوَ مُقَنَّعٌ بِكَفَّيْهِ يَدْعُو»  

I saw the Messenger of Allah ﷺ raising his hands (high enough) in supplication (for rain) that the whiteness of his armpits became visible. (Using translation from Muslim 895a)   

«كَانَ رَسُولُ اللهِ ﷺ يَرْفَعُ يَدَيْهِ فِي الدُّعَاءِ حَتَّى تُرَى إِبْطَاهُ»