How God prepared Moses through privilege and failure in Exodus 2
God prepares Moses for leadership by combining the privilege of his royal upbringing with the humbling consequences of his violent overreach, teaching him dependence.
Miriam's leprosy for challenging Moses in Numbers 12
Miriam and Aaron's challenge to Moses' authority resulted in God directly affirming Moses' unique role and striking Miriam with leprosy, which was healed after Moses interceded.