It is narrated from the Prophet of Islam (PBUH) who said:

God is kinder to girls than boys, a person who makes his daughter happy; God will make him happy on the Day of Judgement. The Prophet (PBUH) added: The best of your children are girls. Any person who looks after three daughters or three sisters, heaven is Wajib for him. No other culture in the entire human’s history has sided with having girls in this way; on the contrary, the situation of girls and women with nations has not been good.

It was due to tireless efforts of the Prophet of Islam (PBUH) which created the great spiritual revolution in the issue of the livelihood of girls and women and having girls. The one who goes to the market and buys things and then takes them home for his wife and child, is like the one who carries the backpack of the poor, the one who consider girls a priority in receiving gifts; indeed, the one who makes his daughter happy, is like freeing a slave from the children of Ismail (AS) in the way of Allah (SWT) [1].

[1] Taken from the book of Nezam-e-Khanevadeh in Islam by Ansarian

Source: en.shafaqna.com