Al-Kāfi - The Book of Prayer

Chapter: Salah (prayer) for Rain َّدُ بْنُ يَحْيَى رَفَعَهُ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ سَأَلْتُهُ عَنْ تَحْوِيلِ النَّبِيِّ (صلّى اللهُ عَلَيْهِ وَآلِه) رِدَاءَهُ إِذَا اسْتَسْقَى فَقَالَ عَلاَ٠َةٌ بَيْنَهُ وَبَيْنَ أَصْحَابِهِ يُحَوَّلُ الْجَدْبُ خِصْباً. 3.

Muhammad ibn Yahya in a marfu‘ manner has narrated the following: “I once asked abu ‘Abd Allah (a.s.), about how the Holy prophet turned his gown upside down when pleading before Allah for rain. He (the Imam) (a.s.), said, ‘It is a sign between him and his companions that turns aridity to fertility.’” رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/438))