Nu’aym b. ‘Abdillah, the scribe of the righteous Caliph ‘Umar b. ‘Abd Al-’Azîz – Allah have mercy on him, narrates that ‘Umar b. ‘Abd Al-’Azîz said:
The fear of showing off and vying with others prevents me from saying much of what could be said.
Abdullah b. Mubârak in Al-Zuhd wa Al-Raqâ’iq Vol. 1 p193, no. 126.