Like the previous two articles on the topic, this verse is also supposedly related to Al-Ghadir.
The narration of the reason of the revelation of verse (70:1):
A man named Jabir or Al-Harith bin Al-Nadhr Al-Abdari came to the Prophet (peace be upon him) and said to him, “O’ Mohammad, you commanded on behalf of Allah to witness that there is no god by Allah, that you are His messenger, to pray, fast, perform the pilgrimage, pay the alms, and we accepted that from you. You were not satisfied by this until you raised the arms of your cousin and preferred him over us, and you said, ‘Whosoever I am his mawla then Ali is his mawla,’ so is this from you or from Allah?”
The Messenger of Allah responded, “By He who there is no god but Him, it is from Allah.”
Jabir/Al-Harith left to his mount and said, “O’ Allah, if what Mohammad said is true, then cause rocks to rain upon us or bring a severe punishment.”
By the time he got to his mount, rocks had fallen on his head and came out of his anus, and he was killed. Then Allah revealed, “One demanding demanded the chastisement which must befall.” (70:1)
Al-Amini, as usual, provides many references for this report, when in reality most of them can be traced to a single report. In this case, he provides a quote from Al-Tha’labi, a fifth century Qur’an commentator, who quotes Sufyan bin Uyayna, who passed away in the second century. No chain is provided for the report.
Al-Amini includes this as source #3 (out of 29), then provides source #6, #7, #8, #15, #29.
Most of the other sources simply provide the report without quoting a chain either.
The only source that Al-Amini provides that actually includes chains is his two quotes from Al-Hakim Al-Hasakani.
The first is a report from the companion Huthaifa bin Al-Yaman. However, it comes through the path of Abdulrahman bin Al-Hasan Al-Asadi who falsely claimed that he heard from Ibn Dayzeel. Refer to his biography in Lisan Al-Mizan.
As for the second chain that he provides that contains a quote from Sufyan bin Uyayna from Al-Sadiq, then it is even more problematic since it is not a Sunni chain in the first place. The narrator, Abu Ahmad Al-Basri is Al-Juludi, the known Twelver historian.
It is also important to point out that the whole surah according to the consensus of the early scholars was revealed in Makkah, with the exception of verse #24, which is seen as a Madani verse according to Al-Hasan Al-Basri. None of the early scholars of the timings of revelation mentioned that 70:1 was revealed in Madinah.
In conclusion, like the previous articles on the subject, this verse cannot be associated with Al-Ghadir.