﴿13﴾ فَرَدَدْنَاهُ إِلَي اُمّـِهِ كَيْ تَقَرَّ عَيْنُهَا وَلاَ تَحْزَنَ وَلِتَعْلَمَ أَنَّ وَعْدَ اللَّهِ حَقٌّ وَلَكِنَّ أَكْثَرَهُمْ لاَ يَعْلَمُونَ
13. “ Thus did We restore him to his mother that her eye might be refreshed, and that she might not grieve, and that she might know that the promise of Allah is true, but most of them do not know.”
Never do the Divine promises fail, but the majority of people are those who see only the surface of the things and have no understanding of the wise secrets and devise plans of Allah.Of course,for thepeople of Truth the aims are important, not the titles.
Finally, the child was returned to the bosom of the mother, though this time the mother was employed as a foster mother. But the title is no important, the return of the child was important. Therefore, this verse says:
might be refreshed, and that she might not grieve, and that
she might know that the promise of Allah is true, but most
of them do not know.”
There arises a question here: Did the people of Pharaoh give the child to the mother to suck him and during this time, every day, or now and then, she had to bring the child into the castle of Pharaoh in order that the Queen of Egypt might have a new visit from him? Or did they keep the child inside the court and Moses’ mother came there in special times and sucked him?
There is not any clear evidence for either of these two probabilities, but the first one seems more fitting.
And also, was Moses transported to the castle of Pharaoh after the end of his sucking period? Or did he usually keep his relation with the mother and his family and used to have familiar intercourse between these two?
Some commentators have said that after the sucking period she gave him to Pharaoh and his wife, ’Āsiyah, and Moses was fostered by them and in their hands. Here there are cited some other stories about the childish but expressive acts of Moses unto Pharaoh that mentioning all of them takes a long space. But this sentence that, after that Moses was appointed to prophethood, Pharaoh told him: “… ‘Did we not cherish you as a child among us, and you tarried among us for (many) years of your life?”, shows that Moses had lived in the castle of Pharaoh for a length of time and had remained there for some years.
It is understood from the commentary of Ali-ibn-’Ibrāhīm that Moses remained in the castle of Pharaoh with utmost honour until the period of his puberty, but his theistic statements made Pharaoh very inconvenient, so much so that he decided to kill Moses. Moses left the castle and entered the city where he confronted the conflict of two men: one from the Coptic people and the other was from among the Children of Israel.
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 The Commentary of Ali-Ibn-'Ibrāhīm, according to Nūr-uth-Thaqalayn, Vol. 4, P. 117