Subhashitam - 45

अम्भसा भिद्यते सेतुः तथा मन्त्रोऽप्यरक्षितः ।
पैशुन्याद्भिद्यते स्नेहः वाचा भिद्येत कातरः ॥

Meaning:
A bridge or a barrage will be damaged by rapid flow of water. A mantra (a mystic word) will be spoiled without practice. The friendship will be lost with vicious nature or tale-bearing nature and a timid person will be conquered even by a word.