If one forgets to observe the woquf in Arafaat [on time]...
If one forgets to observe the woquf in Arafaat [on time], it is obligatory for him to do so in the Designated time if it was possible, failing that, he should observe the Emergency woquf, and then observe the woquf in the Mash‘ar and his Hajj is valid. 30 Being present in Arafaat even for a few minutes constitutes the rukn of woquf, and if one after, say, ten minutes left Arafaat, he has disobeyed the orders of Allah Almighty and has sinned, but his Hajj would not be invalidated.
As mentioned previously, it is obligatory [for the pilgrim] to observe the woquf in Arafaat [during the entire period] from midday noontime / midday until sunset. If, due to deliberate failure, one did not observe the woquf on time, [i.e. not from precisely noontime, but from later on], he has sinned but his Hajj is correct and he is not liable [to do or give] anything. However, if this was due to an oversight or another excuse, he has not sinned, and his Hajj is correct too.
If one did not observe the woquf in Arafaat up to the end of the required time, i.e. he deliberately left Arafaat before sunset, if he repented and returned before sunset, he is not liable to a kaffaarah, and if he does not repent and does not return, he is liable to a kaffaarah of a camel. If he could not afford a camel, he must fast 18 days continually with no interruption between those days. The fast can be in Makkah, en route back to his hometown or when at home.
If due to oversight one departed [Arafaat] before sunset and did not realise this during the time [before sunset] he is not liable to anything. If he realised the oversight before sunset, it is obligatory for him to return to Arafaat, and to remain there until sunset. If he dos not do so and does not return, he has sinned and the ruling of his case is similar to the one who deliberately left Arafaat.
The ruling of the one who does so out of ignorance is the same as that who had forgotten, even if his ignorance being due to him being moqassir. The Designated woquf for Arafaat – as mentioned before – is from midday to sunset, and the Emergency Woquf is from sunset to fajr. The latter is qualifying for anyone who forgot to observe the woquf in Arafaat, or was excused due to any other reason.
However, in the case of the Emergency Woquf it is not obligatory to observe it completely and entirely31 as it is required in the case of the Designated woquf. The obligation in this [Emergency Woquf] is the extent that can be called as “being present there”.