If all the texts of the above Hadīth are collected and analyzed, it
becomes evident that the mother of Sa`ad Ibn ‘Ubādah (rta) had vowed to give
some money in charity and before she could, she died. It is this vowed (nadhr)
Sadaqah which her son had asked the Prophet (sws) about and to which the Prophet
(sws) had given his consent.
This is similar to paying off a debt which is outstanding in a dead person’s
name, and in no way can be regarded as Iīthāl-i-Thawāb.