Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
वह्निचंद्रा रूपदस्राः खरामा व्योमबाहवः ।द्विरामाः स्वाग्नयः शून्यदस्राः कुंजरभूमयः ॥ ४६५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 465.
Then 13, 21, 30, 20, 32, 30, 20 and 18. These are for Mrigashira to Uttara Phalguni.
Simple meaning: Number list for the next eight stars: 13, 21, 30, 20, 32, 30, 20, 18.
रूपपक्षा व्योमदस्रा वेदचन्द्राश्चतुर्दश ।
Number list for the next eight stars: 21, 20, 14, 14, 10, 14, 56, 24.
शून्यदस्राः शून्यचंद्राः पूर्णचंद्रा गतेंद्रवः ।
The last seven stars get 20, 10, 10, 18, 16, 24 and 30.
आभ्यः परास्तु घटिकाश्चतस्रो विषसंज्ञिताः ।
Four periods after those counts are called poison. Avoid them in weddings and other acts.