Valmiki Ramayana Ayodhya Kanda Sarga 7 Shloka 15
Original Shlokaअनिष्टे सुभगाकारे सौभाग्येन विकत्थसे। चलं हि तव सौभाग्यं नद्यास्स्रोत इवोष्णगे।।2.7.15।।
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सुभगाकारे you appear to be your husband's darling, अनिष्टे O one disliked (by the husband), सौभाग्येन with your good fortune, विकत्थसे you are boasting, उष्णगे in summer season, नद्या: river's, स्रोत: इव like a flow, तव your, सौभाग्यम् good fortune, चलं हि is unstable indeed.
Though you appear to be your husband's darling, in reality he dislikes you. The good fortune you boast of indeed is unstable like the stream of a river in summer.