Ní chomain-se th'fhírinne ar thoil daíne.

Ní chomain-se th'fhírinne ar thoil daíne.

(not * should you trample * your * truth * according to * desire * of people)

You should not trample your truth to please others.

This advice to act justly despite pressure from others is found in the "Bríatharthecosc Con Culaind" section of "Serglige Con Culaind".