Quran 31:14

وَوَصَّيۡنَا ٱلۡإِنسَـٰنَ بِوَٲلِدَيۡهِ حَمَلَتۡهُ أُمُّهُ ۥ وَهۡنًا عَلَىٰ وَهۡنٍ۬ وَفِصَـٰلُهُ ۥ فِى عَامَيۡنِ أَنِ ٱشۡڪُرۡ لِى وَلِوَٲلِدَيۡكَ إِلَىَّ ٱلۡمَصِيرُ ١٤

We enjoined the human being to honor his parents. His mother bore him, and the load got heavier and heavier. It takes two years (of intensive care) until weaning. You shall be appreciative of Me, and of your parents. To Me is the ultimate destiny.