Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
वामभेदविधानेन दुष्टोऽपि स्याच्छुभङ्करः ।सौम्येक्षितोऽनिष्टफलः शुभदः पापवीक्षितः ॥ २७८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 278.
By the rule of reverse blocking, even a bad one can become good-making. One looked at by good planets gives bad results. One looked at by bad planets gives good results.
Simple meaning: Reverse blocking can turn a bad planet good. Looks of good or bad planets reverse the result.
निष्फलौ तौ ग्रहौ स्वेन शत्रुणा च विलोकितौ ।
A planet seen by its enemy, or in its low or enemy sign, gives no result.
शुभाशुभफलं नैव दद्यादस्तमितोपि वा ।
A set planet gives no result. When planets sit badly, do a peace ritual.
हानिर्वृद्धिर्ग्रहाधीना तस्मात्पूज्यतमा ग्रहाः ।
Gain and loss depend on planets, so worship them. Wear the right gems.