Brihat Samhita
गर्भः पुष्टः प्रसवे ग्रहौपघातऽदिभिर्यदि न वृष्टः । आत्मीयगर्भसमये करकामिश्रं ददात्यम्भः ॥ २१-३५ ॥
If, owing to adverse planetary influences, the pregnant clouds should fail to yield rain at the seasons described, they will do so at the period of the next conception and in such a case the rain will be marked by a shower of hail.
english translation
garbhaH puSTaH prasave grahaupaghAta'dibhiryadi na vRSTaH । AtmIyagarbhasamaye karakAmizraM dadAtyambhaH ॥ 21-35 ॥
hk transliteration by Sanscript