Charak Samhita
वर्षासु काष्ठाश्मघनाम्बुवेगास्तरोः सरित्स्रोतसि संस्थितस्य। यथैव कुर्युर्विकृतिं तथैव गर्भस्य कुक्षौ नियतस्य दोषाः ॥३०॥
Just as in the rainy season, wood, stone pieces and water current cause derangements in a tree situated in the river stream, doshas cause abnormalities in fetus situated in the womb.
english translation
varSAsu kASThAzmaghanAmbuvegAstaroH saritsrotasi saMsthitasya। yathaiva kuryurvikRtiM tathaiva garbhasya kukSau niyatasya doSAH ॥30॥
hk transliteration by Sanscript