Belief and Duty) is a 1977 Bollywood action drama film, written by Salim–Javed (Salim Khan and Javed Akhtar), directed by Desh Mukherjee and produced by Premji.

The film stars Shashi Kapoor, Sanjeev Kumar, Amitabh Bachchan, Rekha, Aparna Sen, Helen and Prem Chopra.

This is a story about Ahmed and Mohan, who act as mock witnesses and always hang around court to give evidence as per the requirement of a case.

But they soon feel that it's virtually impossible to earn a living as honest citizens.

Meanwhile, Kabir Das is arrested for a murder he claims he did not commit, and the duo promise to help him, and find out who the real killer is, but they end up getting in trouble themselves.