After the terror at the inn, the reunion at Sinai feels like exhale. Targum Pseudo-Jonathan preserves the geography with reverent precision: Aaron came and met him at the mountain where was revealed the glory of the Lord, and he embraced him.
Note where the Targum places the encounter. Not at the mountain of God in the plain Hebrew sense, but at the mountain where was revealed the glory of the Lord — the same Horeb where the burning bush spoke to Moses (Exodus 3:1-2). The Targum is making the reunion theologically freighted. The two brothers embrace on holy ground.
The Older Brother Walks Out to Meet the Younger
Remember how the Targum earlier described Aaron's heart: he cometh forth to meet thee, and will see thee and rejoice in his heart (Exodus 4:14). Now that forecast becomes action. Aaron, the elder brother who had endured Egyptian slavery for all forty of Moses' Midianite years, walks out into the wilderness to meet the younger sibling who returns with the commission.
The embrace is mutual. No jealousy, no recrimination, no accounting of who suffered more. The Targum pictures two grown men, one carrying the sapphire staff of the covenant, the other carrying the knowledge of the slaves' suffering, colliding in joy at the same mountain where God's glory had just been revealed.
The takeaway: every redemption needs a reunion. Before Moses and Aaron can confront Pharaoh, they must first confront each other and find no bitterness. The Jewish imagination insists that the Exodus begins with brotherly love restored on holy ground, because a nation cannot be liberated by men who have not yet made peace with their own families.