It was narrated that Al Harith bin MiskIn said, it being read to him while I was listening: “From Sufyan, from Az-Zuhri, from ‘Ubaidullah bin ‘Abdullah, from Ibn ‘Abbas, that Saad bin ‘Ubadah consulted the Prophet صلی اللہ علیہ وآلہ وسلم about a vow which his mother had to fulfill, but she died before doing so. The Messenger of Allah صلی اللہ علیہ وآلہ وسلمsaid: ‘Fulfill it on her behalf.”(Sahih)