Hajj performed four years ago, but the Tawaf of Ifadah was omitted; what is the ruling?

Question:
May Allah reward you with good, O Shaykh. A questioner, an Egyptian resident in Dammam, says: I performed the obligatory Hajj four years ago as a Mutamatti', combining 'Umrah with Hajj, but I left off the Tawaf of Ifadah. What is the ruling in the Shari'ah, in your view, regarding this? And is it possible for me to perform the Tawaf now when I perform Hajj on behalf of my mother?

Answer:
Should you not hasten to go to Makkah and perform the Tawaf of Ifadah? It is a debt upon you, and your Hajj is not complete without it, for it is a pillar. We seek refuge in Allah from the accursed Shaytan. You must go to Makkah, perform the Tawaf, and do the Sa'y. The Mutamatti' is required to perform the Tawaf and Sa'y for his Hajj, and he is also required to perform the Tawaf and Sa'y for his 'Umrah. So you must perform the Tawaf and the Sa'y.
If you had sexual intercourse during this period, it is obligatory for you to pay a fidyah (ransom payment) by slaughtering an animal in Makkah and distributing it to the poor of the Haram. The fidyah must be from what is acceptable for the 'Id sacrifice, free from defects and of the required age: six months for a sheep, one year or five years for a camel, and two years for a cow. So if you had sexual intercourse, the obligatory fidyah is either a sheep, or one-seventh of a camel, or one-seventh of a cow, to be given in charity to the poor of the Haram. If you did not have sexual intercourse during this period, it is sufficient for you— it is sufficient for you— to perform the Tawaf of Ifadah and the Sa'y between al-Safa and al-Marwah for the Hajj. Yes.