शिवमात्मनि पश्यन्ति प्रतिमासु न योगिनः । It is usually thought that this temple has Swayam-bhu of Lord Hanumana which implies that Hanumana himself experienced appeared below. It is additionally reported which the When the water amount of river Yamuna improves, then the water comes into this temple and the idol https://www.slideshare.net/slideshow/experience-the-spiritual-aura-of-hanuman-temple-adelaide/275741843