There are religious mandatory obligations which are...

There are religious mandatory obligations which are performed in accordance to prescribed limits. e.g.: The fasting during the month of Ramadhan is limited to thirty days, and similarly the Hajj Pilgrimage is limited to performance of certain prescribed Hajj rituals , but contrary to all of them God's-Remembrance does not has any limits and He has not limited himself to a prescribed or minimum amount of invocation.

Then he said: 'My father (Imam al-Baqir a.s.) used to offer a lots of invocation, while walking with him I found him remembering God, when we used to sit together for eating he was still busy with invocation, and even while talking to the people he was not negligent from invocation. I could see his tongue almost attached to his throat while chanting: there is no god except God-Almighty (la illahi Illallahu).

After the morning prayer he used to assemble all of us together and ordered to offer invocation until sun rise. “Then he quoted from the Holy Prophet (S) who said: shouldn't I inform you about your best deeds which would bring for you more distinctions as compared to any other deed ? Which is purest and most desirable before God-Almighty.

Is much better for you as compared to silver, and gold even is superior than the Holy struggle for the sake of God-Almighty.’ The people asked: “Oh Prophet of God! Please tell us.” “Do a lots of God's Remembrance.” Replied the Holy Prophet (S). “Then the Imam said: A man asked the Holy Prophet (S): “Who is the best among the believers ?” “The one who offers a lot of invocation.” Replied the Holy Prophet (S).

He further said: “Who possesses a invocating tongue has indeed been blessed with the goodness of this world and the Hereafter.” [^4] The Holy Prophet (S) said to Abu Dharr: فى وصية ابى ذر قال رسول الله صلى الله عليه وآله: عليه بتلاوة والقرآن وذكر الله كثيرا فانه ذكر لك فى السما ونور لك فى الارض.