Brahmandapurana 3.44.43_2

Brahmāṇḍapurāṇa 3.44.43_2

tadbahirvinnyaseddhīmānāyudhānāṃ catuṣṭayam /
nyasedagnyādikoṇeṣu madhye pīṭhacatuṣṭayam //