वास्तु मण्डन (मण्डन सूत्रधार - गृह, राजप्रासाद, दुर्ग एवं नगर-वास्तु सटीक)

Ch. II – Āyādhikāraḥ 67 27. Under these numbers 'A' and other Mātṛkā, Varṇas are to be written, but Ṛ, long Ṛ, Li, long Li, Visarga and joint words are to be avoided. 28. The alphabets in the name are to be divided by eight. Rest is the āya of man and becomes gehaga due to dhvaja. 29-30. Four types of Vṛṣabha etc. belong to four types of dhvajas etc. These stars and planets are also known as gehagas due to śauca and vyaya. These in buildings ate called bhakṣyas as they eat away into the āya of the owner and hence they are to be discarded. 31. Again, to get the result from the Āya, multiply the length by eight and then it is to be divided by the lunar constellation (27); the remainder is called Nakṣatra. 32. Nakṣatras are of three types, Divine (Daiva), human (Mānuṣa) and Rākṣasa. Rākṣasa brings destruction to a house, like the enmity of Yoni pertaining to Nakṣatras.