Hawzah News Agency – Imam al-Sadiq peace be upon him says:

أحْسنُ مِن الصِّدقِ قائلُهُ، وخَيرٌ مِن الخَيرِ فاعِلُهُ.

'Better than truthfulness is the one who practices it, and better than good is its doer.'

Source: Amali al-Tusi, p. 223, no. 385