My father said, "I heard Ibn `Umar reciting the poetic verses of Abu Talib: And a white (person) (i.e. the Prophet) who is requested to pray for rain and who takes care of the orphans and is the guardian of widows." Salim's father (Ibn `Umar) said, "The following poetic verse occurred to my mind while I was looking at the face of the Prophet (p.b.u.h) while he was praying for rain. He did not get down till the rain water flowed profusely from every roof-gutter: And a white (person) who is requested to pray for rain and who takes care of the orphans and is the guardian of widows . . . And these were the words of Abu Talib."
Sahih al-Bukhari Book 15, Hadith 4
← Previous Hadith We were with `Abdullah and he said, "When the Prophet (ﷺ) saw the refusal of the people to accept Islam he said, "O Allah! Send (famine) years on them for (seven years) like the seven years (of famine during the time) of (Prophet) Joseph." So famine overtook them for one year and destroyed every kind of life to such an extent that the people started eating hides, carcasses and rotten dead animals. Whenever one of them looked towards the sky, he would (imagine himself to) see smoke because of hunger. So Abu Sufyan went to the Prophet (ﷺ) and said, "O Muhammad! You order people to obey Allah and to keep good relations with kith and kin. No doubt the people of your tribe are dying, so please pray to Allah for them." So Allah revealed: "Then watch you For the day that The sky will bring forth a kind Of smoke Plainly visible ... Verily! You will return (to disbelief) On the day when We shall seize You with a mighty grasp. (44.10-16) Ibn Mas`ud added, "Al-Batsha (i.e. grasp) happened in the battle of Badr and no doubt smoke, Al-Batsha, Al-Lizam, and the verse of Surat Ar-Rum have all passed .

Sahih al-Bukhari Book 15, Hadith 3 Next Hadith → Whenever drought threatened them, `Umar bin Al-Khattab, used to ask Al-Abbas bin `Abdul Muttalib to invoke Allah for rain. He used to say, "O Allah! We used to ask our Prophet to invoke You for rain, and You would bless us with rain, and now we ask his uncle to invoke You for rain. O Allah ! Bless us with rain."(1) And so it would rain.

Sahih al-Bukhari Book 15, Hadith 5