Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
आभ्यः परास्तु घटिकाश्चतस्रो विषसंज्ञिताः ।विवाहादिषु कार्येषु विषनाडीं विवर्जयेत् ॥ ४६८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 468.
After these counts come four ghatikas (24-minute unit) called poison. In weddings and other acts, avoid the poison ghatikas.
Simple meaning: Four periods after those counts are called poison. Avoid them in weddings and other acts.
भास्करादिषु वारेषु ये मुहूर्ताश्च निंदिताः ।
Time slots blamed for each weekday should be avoided in weddings, even if they have many good points.
निहितावारदोषा ये सूर्यवारादिषु क्रमात् ।
Weekday faults should be avoided in every good rite, even if the day has all good qualities.
एकार्गलांघ्रितुल्यं यत्तल्लग्नं च विवर्जयेत् ।
Avoid a lagna with the single-bolt fault, even with Venus and Jupiter. It is like milk with poison.