The answer is: Aaron

Num 26:59 - Miriam was their sister. Aaron was 3 years older than Moses (Exo 7:7).

Moses’ brother Aaron plays a pivotal role in the Exodus story and the journey of the Israelites. He was not just a loyal sibling; he became the first high priest of Israel, setting the stage for a priestly lineage that would serve for generations. When you think of Aaron, picture someone who stepped confidently into the spotlight, even when Moses was reluctant.

But did you know that Aaron had his own share of notable stories? For example, during Moses' encounters with Pharaoh, it was Aaron who spoke on his behalf—perhaps a reminder to us about the importance of support from loved ones in our endeavors. Moreover, Aaron's solid and compassionate leadership helped shore up the community's spirit, especially when Moses spent intense moments with God on Mount Sinai.

Let’s not forget the scenery of this historic tale: the Exodus marks a transformational escape from slavery towards a promised land, which echoes hope and liberation themes found in many rich narratives across cultures. There’s even a striking parallel between Moses’ hesitance and Aaron's confidence when they encounter the unknown—it's the perfect illustration of how everyone brings something unique to the table.

As for the sisters, Miriam—known for her strong leadership and musical skills—also played a significant part in preserving the identity of the Israelite community. Together, the siblings each contributed to one of the central events that shaped the Abrahamic faiths, leaving a lasting legacy that echoes through the ages.