It rained over the grave of Harim ibn Hayyaan on the day he died, and then vegetation began to sprout [forthwith].
[When] Harim ibn Hayyaan died it was a hot day. So when they had finished with his grave, there came a cloud which stopped over the grave; it was neither longer nor shorter than it (the grave). And it drizzled over it (the grave) until it had drenched it, and then it went away.
Is it legislated to supplicate [to Allaah] during rainfall; did the Prophet ﷺ or his companions do so?