These things are said through an allegory. For these represent the two testaments. Certainly the one, on Mount Sinai, gives birth unto servitude, which is Hagar.
he said to her: "Hagar, handmaid of Sarai, where have you come from? And where will you go?" And she answered, "I flee from the face of Sarai, my mistress."
in order to fulfill what was spoken through the prophet, saying: "I will open my mouth in parables. I will proclaim what has been hidden since the foundation of the world."
And you have not received, again, a spirit of servitude in fear, but you have received the Spirit of the adoption of sons, in whom we cry out: "Abba, Father!"
And he said: "The Lord went forth from Sinai, and he arose for us from Seir. He appeared from Mount Paran, and thousands of holy ones were with him. The fiery law was in his right hand.