In the Hadith books of Imam Bukhari and Muslim as well as in Mishkaat, there is a lengthy Hadith of the Messenger of Allah (pbuh) narrated by Ibn Umar (ra). In this Hadith three people are mentioned. They were on a journey when they were caught up in heavy rain. They took refuge in a cave. A huge boulder rolled and blocked the cave-entrance, cutting off their escape from the cave. The three decided to supplicate to Allah (twt) on the basis of some deeds which they had done with the greatest of sincerity. The deed which one of the three offered to Allah (twt) as his basis of supplication was about his aged parents and little children. He implored Allah (twt) in the following way: “O Allah! My parents were old and I used to go out for grazing (my animals). On my return I would milk (the animals) and take the milk in a vessel to my parents to drink. After they had drunk from it, I would give it to my children, family and wife. One day I was delayed and on my return I found my parents sleeping, and I disliked waking them up. The children were crying at my feet. That state of affairs continued till it was dawn. O Allah! If You regard that I did it for Your sake, then please remove this rock so that we may see the sky.” So, the rock was moved a bit.