मनुस्मृति - सत्य धर्म

सत्यं ब्रूयात् प्रियं ब्रूयात्
   न ब्रूयात् सत्यमप्रियम् ।
प्रियं च नानृतं ब्रूयात्
   एष धर्मः सनातनः ॥

- मनुस्मृति

One must speak truth. One must speak pleasant. One must not speak the truth that is harsh. One must not speak a lie just because it is pleasant. This is the essence of Dharma.

- Manu Smriti