Imam Ja’far al-Sadiq (a.s.) said: “A promise which a believer makes to his brother is a vow that has no expiation; so he who fails to fulfill it, his failure will he counted against Allah and he will he exposed to His hatred.
Daytoy ket sapasap a naipagpagarup a ti Sindhind ket isu ti Brahmasphuta-siddhanta ni Brahmagupta.[5]