Surah 31. Luqman, Ayah 14

Lit., "his weaning is [or "takes place"] within two years". According to some philologists, the term fisal circumscribes the entire period of conception, gestation, birth and earliest infancy (Taj al-'Arus): in brief, the period of a child's utter dependence on its mother.

Thus, gratitude towards parents, who were instrumental in one's coming to life, is here stipulated as a concomitant to man's gratitude towards God, who is the ultimate cause and source of his existence (cf. {17:23-24}).

The set of milk teeth in a human child is completed at the age of two years, which is therefore the natural extreme limit for breast-feeding. In our artificial life the duration is much less.