It is noteworthy that in this sentence...
It is noteworthy that in this sentence, acting upon these instructions are introduced as the causes of both virtue and purity, (more virtuous and purer), which means that acting upon these instructions removes both the different impurities, resulted from doing some wrong deeds, from families so that it purifies them, and attains development, improvement, favour and blessing for them.
"And the (divorced) mothers shall suckle their children for two whole years for him (father) who desires to complete the period of suckling. It is (incumbent) upon the father to provide (sustenance) and their clothing (nursing mothers) in a fair manner. No soul shall have imposed upon it a duty but to the extent of its capacity; neither shall a mother be made to suffer harm on account of her child, nor a father on account of his child, and the same devolves upon the heir.
But if they desire to wean by mutual consent and consultation, then it is no sin on them. And if you desire to seek a wet nurse for your children, it is no sin on you as long as you pay what you promised for in a fair manner; and be in awe of Allah, and know that Allah sees what you do." In Arabic philology the term /walidah/ is used for 'mother' while the term /umm/ has a wider meaning and, besides applying the term for 'mother', its concept sometimes refers to the 'root' or 'source' of everything.
In this verse, the Qur'an points to several instructions about the problem of suckling and the different rights that mother, child, and father have in this regard. These instructions, on the whole, are seven various ordinances. Seven Instructions upon Suckling 1- The right of nursing the child for two whole years is specialized to mother, because it is she who can suckle and look after her child during this time.