(This dua reminds me to trust Allah completely — whatever He wills for me will reach me, and whatever He doesn’t will never come my way.)
لَا اِلٰهَ اِلَّا اللهُ وَحْدَهُ لَا شَرِیْكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَ هُوَ عَلٰی كُلِّ شَیْئٍ قَدِیْرٌ
اَللّٰهُمَّ لَا مَانِعَ لِمَا اَعْطَیْتَ وَ لَا مُعْطِیَ لِمَا مَنَعْتَ وَ لَا یَنْفَعُ ذَا الْجَدِّ مِنْكَ الْجَدُّ
There is no true deity except Allah alone, having no partners. He alone deserves all sovereignty and praise and He is over all things, Fully Competant. O Allah, no one can prevent what You have willed to bestow and no one can bestow what You have willed to prevent, the wealth of the wealthy one will not help him against You.
[Ṣaḥīḥ al-Bukhārī: 6330]