We have enjoined on man to be good to his parents: His mother carries him in her womb with hardship, and gives birth to him in pain. Thirty months is the period of her carrying and weaning him. When he attains to manhood and the age of forty, he says: “O Lord, guide me to thank You for the favours You have bestowed on me and my parents, and to do things good as may please You, and give me a righteous off-spring. I turn to You in penitence and submit.”