Makardhwaja asked him for his blessings, however, he said to Hanuman, that he will have to fight him to enter Patala, as he cannot betray Ahiravana, his mentor.
Hanuman defeats Makaradhwaja in a duel and binds him to proceed further to ultimately kill Ahiravana and rescue Rama & Lakshamana.
Later on, upon Rama's advice he installed Makardhwaja, as King of Patala before returning to Lanka, to continue war with Ravana.
The first temple of Hanuman and Makardhwaj is situated in a small place called Bhetdwarika in Gujarat.
