What the Prophet (PBUH) said upon seeing rain
Chapter on the Prayer for Rain (Istisqa)
Al-Mughni
Book of the Eclipse Prayers (Solar and Lunar)
Primary text
Upon seeing rain, the Prophet, may Allah be pleased with him, used to say, 'Sayyiban Naafi'an' (a pouring rain, beneficial). This report is established via Imam Al-Bukhari.