The Nārāyaṇastra (Sanskrit: नारायणास्त्र, IAST: Nārāyaṇastra “weapon of Nārāyaṇa”) is a weapon described in the Mahabharata and the Puranas. It is considered the personal weapon of Vishnu in his Nārāyaṇa form.

The Nārāyaṇastra (Sanskrit: नारायणास्त्र, IAST: Nārāyaṇastra “weapon of Nārāyaṇa”) is a weapon described in the Mahabharata and the Puranas. It is considered the personal weapon of Vishnu in his Nārāyaṇa form.