Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The supplication of the Prophet (peace and blessings be upon him) was:
'Allahumma la takilni ila nafsi tarfata ayn, wa la tanzi' minni saliha ma a'taytani'
(O Allah! Do not entrust me to my own self even for the blink of an eye, and do not take away from me the good of what You have given me.)
Al-Bazzar recorded it; its chain contains a narrator, Ibrahim bin Yazid al-Khuzi, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدعية / 17409