Brihat Samhita
आर्द्रं द्रव्यं स्पृशति यदि वा वारि तत्संज्ञकं वा तोयासन्नो भवति यदि वा तोयकार्यौन्मुखो वा । प्रष्टा वाच्यः सलिलं अचिरादस्ति निःसंशयेन पृच्छाकाले सलिलं इति वा श्रूयते यत्र शब्दः ॥ २८-०२ ॥
If the questioner, at the time should happen to touch a wet substance or any substance one of the meanings of whose name is water or if he should be at the time close to water or engaged in work connected with water or if at the time the word ‘water’ should be heard from any body, immediate rain may safely be predicted.
english translation
ArdraM dravyaM spRzati yadi vA vAri tatsaMjJakaM vA toyAsanno bhavati yadi vA toyakAryaunmukho vA । praSTA vAcyaH salilaM acirAdasti niHsaMzayena pRcchAkAle salilaM iti vA zrUyate yatra zabdaH ॥ 28-02 ॥
hk transliteration by Sanscript