Several elders say, that as per vaastu-shastra or some other treatises:
it's forbidden to keep two idols of Lord Ganesha at home. Further, keeping three idols of Bhagwati Durga or any other Deví is also said to be forbidden. Also, one mustn't keep idols of ugra manifestations of God like Maa Kali, Bhairava, Narasimha, etc., at home. Some even say to not keep idols of Suryadeva too, at home.
Is this belief true?
Which scriptures say so? And what all similar rules exists for other divinities?
Yes, this belief is true.
And this belief extends to all the five deities of the Panchayatana-puja, the Pancha-Mahadevtas viz. Ganesha, Surya, Vishnu, Shiva & Durga, besides Shankha (conches), and other shilas.
The scriptural reference to this is found in the Narada Maha-Purana.
शंखचक्रशिलालिंगविघ्नसूर्यद्वयं तथा ॥
शक्तित्रयं न चैकत्र पूजयेद्दुःखकारणम् ॥ ६७-१२० ॥
- One should never worship two shankhas, two chakras, two shilas (the Shaligrama), or two Shivalingas, two idols of Vighneshvara (Ganesha), two of the Suns, and three Shaktis (Durga) together. It is conducive to misery and sorrow.
English Translation by Motilal Banarsidass Publishers
