Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
कुलीरसिंहयोः कीटचापयोर्मीनमेषयोः ।गंडातमंतरालं स्याद्घटिकार्द्धं मृतिप्रदम् ॥ ४४८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 448.
The gap between Cancer and Leo, Scorpio and Sagittarius, and Pisces and Aries is gandanta (the edge-point between signs). It lasts half a ghatika (24-minute unit) and may bring a risk to life.
Simple meaning: The gap between those pairs of signs is a risky junction for half a ghatika.
सार्पैन्द्रपौष्णभेष्वंत्यषोडशेशा भसंधयः ।
The ends of Ashlesha, Jyeshtha and Revati and the starts of Magha, Mula and Ashvini are danger junctions.
उग्रं च संधित्रितयं गंडातं त्रिविधं महत् ।
Gandanta has three kinds. Two bad planets facing the lagna make a worse fault.
सा कर्तरीति विज्ञेया दंपत्योर्गलकर्तरी ।
Bad planets on both sides of the lagna cut it. Do not use such a lagna.