The Book of Praying for Rain (Al-Istisqa')
17/9. Chapter:
How to raise the hands
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ خَالِدِ بْنِ يَزِيدَ، عَنْ سَعِيدِ بْنِ أَبِي هِلاَلٍ، عَنْ يَزِيدَ بْنِ عَبْدِ اللَّهِ، عَنْ عُمَيْرٍ، مَوْلَى آبِي اللَّحْمِ عَنْ آبِي اللَّحْمِ، أَنَّهُ رَأَى رَسُولَ اللَّهِ صلى الله عليه وسلم عِنْدَ أَحْجَارِ الزَّيْتِ يَسْتَسْقِي وَهُوَ مُقْنِعٌ بِكَفَّيْهِ يَدْعُو .
It was narrated from Abi Al-Lahm that: He saw the Messenger of Allah at Ahjar Az-Zait praying for rain and raising his hands, making supplications.
Reference : Sunan an-Nasa'i 1514In-book reference : Book 17, Hadith 11English translation : Vol. 2, Book 17, Hadith 1515