This Is My Faith - Al-fatlawi, Ali - الصفحة ٢٩٤ - The Details of the Two Conceals (Al-Ghaibah)
Hasan: It is frequently reported that he attends the pilgrimage to Mecca (Al-Haj) and the graves of his ancestors as well as the grave of his grandfather, Imam Husain (PBUH); he answers whoever calls for help and contact the virtuous people and the religious scholars according to what is best.
This is also emphasized through what Zararah reported from Abu Abdulla (PBUH): “People miss their Imam, so he attends the pilgrimage; he sees them but they do not see him”.
Sheikh Al-Tousi([١٦]) in his book ‘Al-Ghaibah’ (The Conceal) reports from the second Ambassador, Mohammad Bin Othman Al-Omari that “By God, the person in charge of this matter is present the pilgrimage every year; he sees people and knows them and they see him but they do not know him”.
There are several other proofs confirming his presence as well as his communication with the believers.
Anwar: Very good. I would like to ask something.
[١٦] Nasir al-Tusi Outstanding Persian philosopher, scientist, and mathematician. Educated first in Ṭūs, where his father was a jurist in the Twelfth Imam school, the main sect of. He made important contributions to astronomy and wrote many commentaries on Greek texts.