In Parashat Lech Lecha we learn that after returning the spoils of the war, Abraham gave Maaser to Malkitzedek. Commentators deduct that this was Maaser Ksafim (monetary tithes).
In Parshiyot Lech Lecha and Vayera we see two occasions on which Abraham was given generous gifts, one after visiting Pharaoh and one after visiting Abimelech. However, the Torah does not mention that Abraham continued the Minhag of giving the Maaser to Cohen.
Did Abraham give Maaser after earning from Pharaoh and Abimelech?