Hadith 898 - The Book of Prayer - Rain - Sahih Muslim - صحيح مسلم - Collection of Actions, Sayings and Teachings of Prophet Muhammad (صلى الله عليه و سلم) - Kutub as-Sittah

9. The Book of Prayer - Rain - كتاب صلاة الاستسقاء‏

2) Chapter: The Supplication When Praying For Rain

Anas (b. Malik) reported:

It rained upon us as we were with the Messenger of Allah (ﷺ). The Messenger of Allah (way peace be upon him) removed his cloth (from a part of his body) till the rain fell on it. We said: Messenger of Allah, why did you do this? He said: It is because it (the rainfall) has just come from the Exalted Lord.

Reference: 898
English reference: Book 4, Hadith 1960
In-book reference: Book 9, Hadith 14
Grade: Sahih
Read this hadith from Darussalam Collection

2) باب الدُّعَاءِ فِي الاِسْتِسْقَاءِ ‏

وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا جَعْفَرُ بْنُ سُلَيْمَانَ، عَنْ ثَابِتٍ الْبُنَانِيِّ، عَنْ أَنَسٍ، قَالَ قَالَ أَنَسٌ أَصَابَنَا وَنَحْنُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم مَطَرٌ قَالَ فَحَسَرَ رَسُولُ