Targum for Genesis 24:62

And Izhak was coming from the school of the Rabba Shem, by the way of the fountain where had been revealed to him the Living and Eternal One, who seeth, and is not seen; and he resided in the land of the south.

And Izhak was coming from the school of the Rabba Shem, at the fountain where had been revealed to him the Shekinah of the Lord; and he dwelt in the land of the south.