Allah's Messenger (ﷺ) went out to this Musalla (praying place) to offer the prayer of Istisqa.' He invoked Allah for rain and then faced the Qibla and turned his Rida' (upper garment) inside out.
Sahih al-Bukhari Book 80, Hadith 40
← Previous Hadith While the Prophet (ﷺ) was delivering a sermon on a Friday, a man stood up and said, "O Allah's Messenger (ﷺ)! Invoke Allah to bless us with rain." (The Prophet (ﷺ) invoked Allah for rain.) So, the sky became overcast and it started raining till one could hardly reach one's home. It kept on raining till the next Friday when the same man or another man got up and said (to the Prophet), "Invoke Allah to withhold the rain from us, for we have been drowned (with heavy rain )." The Prophet (ﷺ) said, "O Allah! Let it rain around us and not on us." Then the clouds started dispersing around Medina and rain ceased to fall on the people of Medina.

Sahih al-Bukhari Book 80, Hadith 39 Next Hadith → My mother said, "O Allah's Messenger (ﷺ)! Please invoke Allah on behalf of your servant." He said, "O Allah! Increase his wealth and children, and bestow Your Blessing on whatever You give him." a time of distress.

Sahih al-Bukhari Book 80, Hadith 41