Sādhu

Sādhu is a Pāḷi word which means good, excellent or auspicious. Examples of the word’s use are: ‘It is sādhu to see noble ones’ (D.I,88), ‘It is sādhu to control the mind’ (Dhp.35), ‘Even one who leads a sādhu life will decline by consorting with a lazy person’ (It.71). Sādhu is also occasionally used in the Tipiṭaka as an exclamation. To show his appreciation of something Sāriputta had said the Buddha responded: ‘Sādhu, sādhu  Sāriputta!’ (Vin.I,56).  Today it is common for people in Buddhist countries to say sādhu three times to express their happiness or approval of something related to the Dhamma.