Nu’aym b. ‘Abdillah, the scribe of the righteous Caliph ‘Umar b. ‘Abd Al-‘Azīz – Allah have mercy on him, narrates that ‘Umar b. ‘Abd Al-‘Azīz said:

The fear of showing off and vying with others prevents me from saying much of what could be said.

Abdullah b. Mubārak in Al-Zuhd wa Al-Raqā’iq Vol. 1 p193, no. 126.