R. Bana'ah says: In the merit of the mitzvoth performed by Abraham I will split the sea for them, viz. (Genesis 22:3) "and he split the wood for the burnt-offering" — and here (Exodus 14:21) "and the waters were split."
When Abraham Bound His Son Isaac for the Offering on Mount Moriah
Mekhilta Tractate Vayehi Beshalach 4:8