Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
यादृशेनेंदुना भानोः संक्रांतिस्तादृशं फलम् ।नरः प्राप्नोति तद्राशौ शीतांशोः साध्वसाधु च ॥ २६६ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 266.
Look at the state of the Moon when the Sun's sankranti (the Sun's entry into a sign) takes place. The result is of that same kind. A person gets good or bad by the Moon's sign at that time.
Simple meaning: The Moon's state at the Sun's entry decides whether the entry is good or bad for a person.
संक्रांतेः परतो भानुर्भुक्त्वा यावद्भिरंशकैः ।
After the Sun enters a sign and covers some degrees, the next turn of its course follows.
संक्रांतिग्रहगर्क्षंवा जन्मन्युभयपार्श्वयोः ।
The star of a sankranti or an eclipse next to the birth star is not wanted for vows and marriage.
ताराबलेन शीतांशुर्बलवांस्तद्वशाद्रविः ।
Star count strength makes the Moon strong. Through the Moon, the Sun and others become strong.