And We have enjoined on a human being to do good to his parents. His mother bears him with trouble and pain and brings him forth with trouble and pain. The bearing of him and his weaning (takes) thirty months, till when he attains his full maturity and reaches (the age of) forty years he says to his Lord, `My Lord! rouse me up that I may give thanks for the favours you have bestowed on me and on my parents and that I may do such righteous deeds as may please You. And (my Lord!) establish righteousness among my progeny for me. To You indeed I turn penitently and I am surely of those who submit themselves (to You).'