The ruling on combining Hajj and 'Umrah at the same time

The questioner:
Shaykh, we combine them.

The Shaykh:
If you prayed before entering the city, you pray Maghrib three times and 'Isha' anew. If you wait until you enter, you pray Maghrib three times and 'Isha' with the people. Did you understand or not? With the people, four.

The questioner:
Come on, it is upon you, O Shaykh, the prohibition of 'Umar (may Allah be pleased with him). Does the prohibition apply to him? Abu 'Umar (may Allah be pleased with him). What? It is upon you. Explain the entering into ihram.

The Shaykh:
So this was their independent legal reasoning, or they forgot the Sunnah, or it was their independent legal reasoning. It is narrated from al-Siddiq and from 'Umar, and the correct thing is what the Messenger (peace and blessings be upon him) did and ordered.

The questioner:
Does the prohibition from the Qur'an apply to it, O Shaykh? Does the prohibition from the Qur'an apply to it?

The Shaykh:
Their intention is entering into ihram for Hajj. That is, the Sunnah's intention is that every need is to enter into ihram for Hajj, and every 'Umrah is at another time, so that the visitors and pilgrims increase throughout the year.

The questioner:
And look at the men.

The Shaykh:
It was their independent legal reasoning as well, and the Sunnah is above them.

The questioner:
How does he combine this with the fact that he is the narrator of the hadith, O Shaykh?

The Shaykh:
A person may forget, and he may exercise independent legal reasoning while being protected from error; he may exercise independent legal reasoning and he may forget. End.