Sunan an-Nasa'i, Volume 2, Book 17, Hadith 1508 (DarusSalam) ⓘ
It was narrated from Abdullah bin Zaid that: The Messenger of Allah prayed for rain wearing a black khamisah.
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا عَبْدُ الْعَزِيزِ، عَنْ عُمَارَةَ بْنِ غَزِيَّةَ، عَنْ عَبَّادِ بْنِ تَمِيمٍ، عَنْ عَبْدِ اللَّهِ بْنِ زَيْدٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم اسْتَسْقَى وَعَلَيْهِ خَمِيصَةٌ سَوْدَاءُ .
also referenced under: Hadith 1507 (Reference) & Book 17, Hadith 4 (In-Book)