Abu Sa'id al-Khudri said that the Messenger of Allah, may Allah bless him and grant him peace, said, "No one has three daughters or three sisters and is good to them but that he will enter the Garden."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لاَ يَكُونُ لأَحَدٍ ثَلاَثُ بَنَاتٍ أَوْ ثَلاَثُ أَخَوَاتٍ فَيُحْسِنُ إِلَيْهِنَّ إِلاَّ دَخَلَ الْجَنَّةَ