Duas for sustenance, wealth, and halal income
O Allah, I am Your servant, son of Your servant, son of Your female servant. My forelock is in Your hand. Your command over me is forever executed. Your decree concerning me is just. I ask You by every name that You have called Yourself, or revealed in Your Book, or taught to any of Your creation, or which You have reserved to Yourself in the knowledge of the unseen which is with You, to make the Qur'an the springtime of my heart, and the light of my chest, the banisher of my grief, and the reliever of my worries.
O Allah, I ask You for its goodness, the goodness of what it contains, and the goodness of what it is meant for. And I seek refuge in You from its evil, the evil of what it contains, and the evil of what it is meant for.
If you were to rely on Allah with the reliance that is truly due to Him, He would provide for you as He provides for the birds; they go out hungry in the morning and come back full in the evening.