So Samuel grew, and the LORD was with him and let none of his words fall to the ground.
1 Samuel 3:19
Surrounding context
3:18 Then Samuel told him everything, and hid nothing from him. And he said, "It is the LORD. Let Him do what seems good to Him."
3:19 So Samuel grew, and the LORD was with him and let none of his words fall to the ground.
3:20 And all Israel from Dan to Beersheba knew that Samuel had been established as a prophet of the LORD.