Taken from al-A'dāb al-Mufrad by imām Bukhārī:

Someone who looks after two (or more) daughters

76. 'Uqba ibn 'Amir reported that he heard the Messenger of Allāh, may Allāh bless him and grant him peace, say, "If someone has three daughters and is patient with them and clothes them from his wealth, they will be a shield against the Fire for him."

77. Ibn 'Abbās reported that he heard the Messenger of Allāh, may Allāh bless him and grant him peace, say, "There is no Muslim who has two daughters and takes good care of them but that he will enter the Garden."

78. Jābir ibn 'Abdullah reported that the Messenger of Allāh, may Allāh bless him and grant him peace, said, "Anyone who has three daughters and provides for them, clothes them and shows mercy to them will definitely enter the Garden." A man from the people said, "And two daughters, Messenger of Allāh?" He said, "And two."

Someone who looks after three sisters

79. Abu Sa'id al-Khudri said that the Messenger of Allāh, may Allāh 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."

The excellence of someone who looks after his daughter after she has been sent back home

80. Musa ibn 'Ali reported that the Prophet, may Allāh bless him and grant him peace, said, "Shall I show you the greatest sadaqah (or one of the greatest forms of sadaqah)?" He replied, "Yes, indeed, Messenger of Allāh!" He went on, "To provide for your daughter when she is returned to you and you are her sole source of provision."

81. Suraqa ibn Ju'shum reported that the Messenger of Allāh, may Allāh bless him and grant him peace, said the like of previous hadith.

82. Al-Miqdam ibn Ma'dikarib heard the Messenger of Allāh, may Allāh bless him and grant him peace, say, "What you feed yourself is sadaqah for you. What you feed your child is sadaqah for you. What you feed your wife is sadaqah is for you. What you feed your servant is sadaqah for you."