Regarding sisters whose father has passed away, and their brother takes responsibility for them by supporting them and being good to them The condition of beneficence is that it is in accordance to the Islamic legislation, not in what contradicts it
A man said: 'O Messenger of Allah; or two? except that Meaning the reward for doing this for them In contrast to boys, due to their physical strength, commanding speech, and ability to handle the affairs of their interests in most cases

هل يوجد فضل لمن كان أول أولاده بنتا ؟

or three sisters Meaning his sisters and is beneficent towards them Meaning in addition to taking care of them, is good to them while living with them.

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هل يوجد فضل لمن كان أول أولاده بنتا ؟
In this Hadeeth is an emphasis of the rights of girls over boys due to their weakness in seeking a means of provision for themselves
مات وترك ثلاث بنات وإخوة
من كان له ثلاث بنات فصبر على لأوائهن
and whoever takes care of three daughters, or three sisters and raises them with good manerisms, is merciful towards them until Allah grants them independence, Allah would obligate the entrance to Jannah for him
The scholars differed concerning the beneficence that is directed towards girls, is it restricted to what is obligated or does it surpass that, and the latter seems to be correct He was asked; or one? All of this is included in the generality of this Hadeeth
by al-Muhaddith stated in at-Taqreeb: Whoever takes care of three girls Meaning takes responsibility for them and for their provision

فضل البنات والصبر على تربيتهن

When al Imam Ahmad, may Allah have mercy upon him, was told that he was blessed with a daughter he said: "Prophets had daughters! He would be rewarded a great reward for this.

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شرح حديث من كان له ثلاث بنات
Such that he does not remind them of his favors, nor does he display discomfort or signs of tiring towards them
من كانت له ثلاث بنات فصبر على لأوائهن و ضرائهن و سرائهن أدخله الله الجنة بفضل رحمته إياهن ، فقال رجل : أو اثنتان يا رسول الله ؟ قال : أو اثنتان ، فقال رجل : أو واحدة يا رسول الله ؟ قال : أو واحدة .
] No one from my Ummah who takes care of three girls Meaning takes responsibility for all their needs, including feeding and clothing them
الدرر السنية
and feeds, gives them to drink and clothes them