This dua was said by Musa (alayhis salam) on his way to Madyan:
رَبِّ إِنِّي لِمَا أَنزَلْتَ إِلَيَّ مِنْ خَيْرٍ فَقِيرٌ
Rabbi inni lima anzalta illayya min khairen faqeer. (O my Lord! truly I am in (desperate) need of any good that You do give me!”
Mentioned in Surah Qasas, verse 24
