Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 11 · Rain, Kurma Chakra, Utpata
वृष्टिः कूर्मचक्रम् उत्पाताश्च
अल्पवृष्टिः पापदृष्टे प्रावृट्कालेऽचिराद्भवेत् ।चंद्रश्चेद्भार्गवे सर्वमेवंविधगुणान्विते ॥ ६२२ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 722.
If bad planets see the Moon in the rainy season, little rain comes soon. All this holds if the Moon is with Venus and has such qualities.
Simple meaning: Bad planets seeing the Moon bring little rain. The same holds for the Moon with Venus.
प्रावृषींदुः सितात्सप्तराशिगः शुभवीक्षितः ।
In the rains, the Moon in these places can bring more rain.
सद्यो वृष्टिकरः शुक्रो यदा बुधसमीपगः ।
Venus close to Mercury brings quick rain. The Sun between them can stop the rain.
मघादिपंचधिष्ण्यस्थः पूर्वे स्वातित्रये परे ।
Venus in these stars brings heavy rain. The other way round, it brings none.