Amitabh Bachchan is planning to visit shrine of Hazrat Khwaja Moinuddin Chisti in Ajmer Tuesday to untie the thread that he had tied almost 40 years ago as a 'mannat' (wish).

"I plan to go to Ajmer Sharif tomorrow... a most respected and important place of prayer... it carries the belief that if you tie a thread at the mazaar as a 'mannat', it comes true, " Big B posted on his blog.

"Almost 40 years ago when I was just about to start my work as an actor in this industry, I had visited Ajmer and had tied a thread on the filigree work that surrounds the main area... for long I had wanted to revisit it and untie it, as a fulfilment of that mannat.

"Tommorrow if all goes well, I shall be able to complete it. You untie any thread, for it is difficult to find the one that one ties almost 40 years back, and that is taken as a completion of your wish. If you wish another wish you tie another thread, " he added.

Big B says it will be a nostalgic visit.

"I was an unknown visitor then. I wait to see how it shapes up now tomorrow ... more things in life fraught with undesirability are overcome with prayer than any other...prayer, that is a dedication and belief in one such superior power that shall when called out to, hopefully deliver... I need that deliverance... and the prayer, " he posted.

The shrine, dedicated to the Sufi saint who came to Ajmer from Persia in 1192, attracts thousands of pilgrims throughout the year.