Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 9 · Vastu, Griha Pravesha
वास्तु गृहप्रवेशश्च
मासाः स्युर्गृहनिर्माणे पुत्रारोग्यधनप्रदाः ।अकारादिषु भागेषु दिक्षु प्रागादिषु क्रमात् ॥ ५५९ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 559.
these months, for building a house, give sons, health and wealth. The letter groups starting with 'a' go to the directions from east, in order.
Simple meaning: These months bring sons, health and wealth. Each letter group of the alphabet has its own direction.
खरोश्वोथ हरिः श्वाख्यः सर्पाखुगजशाशकाः ।
Each letter group has an animal. The fifth group from your own is your enemy.
साध्यवर्गः पुरः स्थाप्य पृष्ठतः साधकं न्यसेत् ।
Compare the letter groups of the place and the person. It is good when gain is more than debt.
आरभ्य साधकं घिष्ण्यं साध्यं यावच्चतुर्गुणम् ।
Count the stars from the person to the place, multiply by four, divide by seven. The remainder shows gain.