Dua of Musa (Moses, A.S) for good

فَسَقَىٰ لَهُمَا ثُمَّ تَوَلَّىٰ إِلَى الظِّلِّ فَقَالَ رَبِّ إِنِّي لِمَا أَنْزَلْتَ إِلَيَّ مِنْ خَيْرٍ فَقِيرٌ

Al-Qasas (28:24)

So he watered [their flocks] for them; then he went back to the shade and said, “My Lord, indeed I am, for whatever good You would send down to me, in need.”