Matsya Purana 259.14

259.14

caturbhujo'ṣṭa bāhurvā jñānayogeśvaro mataḥ.
tīkṣṇanāsāgradaśanaḥ karālavadano mahān .. 259.13

The image of the Lord with 4 or 8 hands represents His Jñāna Yogeśvara form. The image of His Bhairava form should be made with an aquiline nose, sharp teeth and formidable appearance and can be placed in every house. The images of Bhairava Narasiṅha and Varāha are also formidable and these should never be placed in the Mûla ayatana (main dwelling house).—13-15