Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Travel Muhurta
यात्रामण्डलचिन्ता
उदीची च तथा प्राची तयोरैक्यं प्रकीर्तितम् ।पश्चिमा दक्षिणा या दिक्तयोरैक्यं तथैव च ॥ ५ ॥
In the full Agni Purana this is chapter 233, verse 5.
North and east are said to be one. West and south are likewise one.
Simple meaning: North and east go together as one. West and south go together as one.
वाय्वग्निदिक्समुद्भूतं परिघं न तु लङ्घयेत् ।
Do not cross the line from north-west to south-east. Sunday, Monday and Saturday are not good.
कृत्तिकाद्यानि पूर्वेण माघाद्यानि च याम्यतः ।
Each group of stars belongs to a direction: Krittika east, Magha south, Anuradha west, Dhanishta north.
सर्वद्वाराणि शस्तानि च्छायामानं वदामि ते ।
All the star doors are good. The shadow measure is 20 on Sunday and 16 on Monday.