Ayesha reported,

The Messenger of Allah ﷺ, whenever he saw rain, would say, "A beneficial downpour."

Azami 11890

Sahih

عن عائشة

أن رسول الله ﷺ كان إذا رأى المطر قال: صيبا نافعا

الأعظمي 11890صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Tafsir of the great Quran
Chapter
Virtues of Surah Baqarah
Section
His saying, "Or like a rainstorm from the sky wherein is darkness, thunder, and lightning. They put their fingers in their ears to protect themselves from the thunderbolts in fear of death. And Allah encompasses the disbelievers. The lightning almost snatches away their sight. Whenever it lights up for them, they walk therein, and when darkness covers them, they stand still. And if Allah had willed, He could have taken away their hearing and their sight. Indeed, Allah is over all things competent."
Numbering
Jami al-Kamil 11890 (2nd edition)
Azami 11890