Mukhtasar Bukhari

Narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that a woman from the tribe of Juhaina came to the Prophet (peace and blessings of Allah be upon him) and said: "My mother had vowed to perform Hajj but she could not perform it before she died. So, should I perform Hajj on her behalf?" The Prophet (peace and blessings of Allah be upon him) said: "Yes, perform Hajj on her behalf. Tell me, if your mother had a debt, would you not pay it off for her? So, fulfill Allah's debt, for Allah has more right that His debt be fulfilled."