Dhammapada verses 9 and 10

9. Whoever being depraved, devoid of self-control and truthfulness, should don the monk’s yellow robe, he surely is not worthy of the robe.

10. But whoever is purged of depravity, well-established in virtues and filled with self-control and truthfulness, he indeed is worthy of the yellow robe.

– Dhammapada I – Yamakavagga: Pairs 9 – 10