Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 9 · Vastu, Griha Pravesha
वास्तु गृहप्रवेशश्च
अत्यंतवृद्धिदं नॄणामीशानप्रागुदग्प्लवम् ।अन्यदिक्षु प्लवे तेषां शश्वदत्यंतहानिदम् ॥ ५४२ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 542.
Land that slopes to the north-east, east or north gives people very great growth. A slope in the other directions tends to bring heavy loss.
Simple meaning: A plot sloping north-east, east or north brings growth. Other slopes can bring loss.
समगर्तारत्निमात्रं खनित्वा तत्र पूरयेत् ।
Dig a small pit and refill it. Extra earth means growth, less earth means loss.
तथा निशादौ तत्कृत्वा पानीयेन प्रपूरयेत् ।
Fill the pit with water at night. Water in the morning means growth. No water means loss.
एवं लक्षणसंयुक्तं सम्यक् क्षेत्रं समीक्ष्यते ।
A plot with these signs is good. To find directions, draw a circle in the middle.