The pillar from which tawaf begins, the ruling on one who begins tawaf from another pillar, and the rulings that follow from that?

Question:
May Allah reward you with good, and may He do you good. I performed 'Umrah, praise be to Allah, but I began my tawaf from one of the pillars of the Ka'bah, not from the pillar where the Black Stone is located. Please advise me on what I did. May Allah reward you with good.

Answer:
If you intended to count the lap you started from other than the Black Stone—meaning you started from the pillar after the Black Stone, the Iraqi or Syrian pillar—and you built your tawaf on that lap, then your tawaf is incomplete and invalid. However, if you started from the Yemeni pillar and passed the Black Stone, then that lap is valid, and building on it is valid for seven laps, because you passed the Black Stone. The most that can be said is that you started from the Yemeni pillar by mistake, and this is an addition that does not harm, praise be to Allah. But if you started from the pillar after the Black Stone, such as the Iraqi or Syrian pillar, then that lap is incomplete and invalid, and it is not permissible to build on it. Rather, you must have seven other laps. If you have completed your 'Umrah without completing seven laps of tawaf, then your 'Umrah is invalid. You are required to put on the ihram garments again, return to Makkah, and perform the rites of 'Umrah, including tawaf, sa'y, and shaving or cutting the hair. If you had intercourse with your wife, your 'Umrah is invalid. You must proceed with it as we mentioned: go to Makkah and perform it, then return to the miqat from which you entered ihram for the first invalid 'Umrah. Enter ihram from there for a new 'Umrah to make up for the invalid one, and complete the rites of 'Umrah as a second 'Umrah to make up for the invalid one. You must also slaughter a sheep in Makkah and distribute it to the poor of the Haram. Yes?