The episode of the gorge of Abi Talib did not happen they way it is generally narrated in the books of Seerah. According to the research of Dr Khalid Masood it happened this way:
“Abū Hurayrah (rta) relates that, when they were in Minā during the last day of
the ḥajj, the Prophet (sws) said that they would descend into the valley of the
Banū Kanānah the next day. This was the place where people promised to remain
disbelievers, the Quraysh and the Banū Kanānah swore that they would neither
marry into Banū Hāshim and the Banū Muṭṭalib, nor have any commercial
dealings with them, until they gave up the Prophet (sws) to them.1
This is far more close to reality than the previous narrative. According to this,
the situation may have been somewhat as follows: a group of the disbelievers of
the Quraysh promised each other that they would boycott both the Banū Hāshim
and the Banū Muṭṭalib, who had remained steadfast in their support to Banū
Hāshim. The boycott included not getting involved in mutual marriages and
ending all trade relations with them. It had no clause that covered a ban on
getting food to them, or besieging them. This promise was made in a valley of
Minā, not in Makkah, and whatever status it had for those who participated, it
was not an agreement made by the Quraysh, hence it was not written down.”
The details you can find in his book “Hayat e Rsool e Ummi”. Its English version is “The Life of the Gentile Prophet”.
Therefore no mention of this episode is in Quran. The verse kept on revealing from time to time.