31:14
And We have enjoined (upon) man for his parents - carried him his mother (in) weakness upon weakness, and his weaning (is) in two years that "Be grateful to Me and to your parents; towards Me (is) the destination.
46:15
And We have enjoined (on) man to his parents kindness. Carried him his mother (with) hardship and gave birth to him (with) hardship. And (the) bearing of him and (the) weaning of him (is) thirty month(s) until, when he reaches his maturity and reaches forty year(s), he says, "My Lord, grant me (the) power that I may be grateful (for) Your favor which You have bestowed upon me and upon my parents and that I do righteous (deeds) which please You, and make righteous for me among my offspring, indeed, I turn to You and indeed, I am of those who submit."