Sunan an-Nasa'i, Volume 2, Book 17, Hadith 1515 (DarusSalam) ⓘ
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.
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 .
also referenced under: Hadith 1514 (Reference) & Book 17, Hadith 11 (In-Book)