Manusmriti
न वृथा शपथं कुर्यात् स्वल्पेऽप्यर्थे नरो बुधः । वृथा हि शपथं कुर्वन् प्रेत्य चैह च नश्यति ॥ १११ ॥
Let no wise man swear an oath falsely, even in a trifling matter; for he who swears an oath falsely is lost in this (world) and after death.
english translation
na vRthA zapathaM kuryAt svalpe'pyarthe naro budhaH । vRthA hi zapathaM kurvan pretya caiha ca nazyati ॥ 111 ॥
hk transliteration by Sanscript