Valmiki Ramayana Sundara Kanda Sarga 22 Shloka 19
Original Shlokaतस्य धर्मात्मनः पत्नीं स्नुषां दशरथस्य च। कथं व्याहरतो मां ते न जिह्वा व्यवशीर्यते।।5.22.19।।
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धर्मात्मनः righteous, तस्य his, पत्नीम् wife, दशरथस्य Dasaratha's, स्नुषां च daughterinlaw also, माम् me, व्याहरतः while you speak, ते you, जिह्वा tongue, कथम् how is it, न व्यवशीर्यते not snap and fall down on the ground?
"Why does not your tongue drop down while you speak such words against this consort of the righteous king (Rama) and daughterin law of Dasaratha?