Islam commands justice in all matters and this general ruling is applied to all children regardless of their sexes. Allah, the Exalted, states in the Glorious Qur'an:
(Verily Allah enjoins justice and the doing of good, and liberality to kith and kin, and He forbids all shameful deeds, wickedness, and injustice and oppression. He admonishes you that you may take heed.
[16:90]
Aishah, the Prophet's wife and the mother of the believers (may Allah exalt their mention) said: A poor woman came to my door carrying two little girls. I offered them three dates (i.e. since I had nothing else). She gave each of her two girls a date, and lifted the third one to her mouth to eat. Both her daughters urged her to feed them more, so she split the last date into two pieces and gave one half to each of her two daughters. I admired what the woman had done and told the story to the Prophet of Allah (Peace be upon Him) who said upon hearing it:
"Verily Allah obligated paradise for her due to this act of hers" or "liberated her from the Hellfire due to this act of hers."
[Muslim #2630]
And in another authentic narration he said at the end:
"Whoever is tested by trials in caring for these daughters, they will be a cover for him from Hellfire."
[Bukhari #1352 & Muslim #2629 ]
Islam calls for material and emotional justice and fair treatment from both parents to their children, regardless of their sexes. A male child is not to be given special preference over a female child, or vice versa. The Prophet of Allah (Peace be upon Him) said to one of his companions who had given a present to only one of his children:
"Did you give all your children like this?"
He said: "No."
He said: "Fear Allah and be just with all of your children."
[Muslim #1623]
