The Prophet (peace and blessings be upon him and his family) said: "Whoever takes care of three daughters or three sisters, Paradise becomes obligatory for him." It was asked: "O Messenger of Allah سبحانه وتعالى, what about two?" He صلى الله عليه وعلى آله وسلم replied: "And two (meaning same reward)." It was asked: "O Messenger of Allah سبحانه وتعالى, and one?" He صلى الله عليه وعلى آله وسلم said: "And one (meaning same reward)."