Namaz ki qubooliyat

Ek sahabi ne Hazoor Sallalah-o-Alaehi Wasallum se pucha k hamain kaisay pata chalega k hamari namaz qubool hogayi hai?
Ap Sallalah-o-Alaehi Wasallum ne jawab diya k, “Jab agli namaz perhne ka khud dil chahay ga”