Valmiki Ramayana Sundara Kanda Sarga 55 Shloka 33

सः हनूमान् that Hanuman, दृष्ठार्थैः with proofs having seen, निमित्तै: with omens, महागुणैः good tidings, कारणैश्च and by reasons, ऋषिवाक्यैश्च by the sages words, प्रीतमानसः happy at heart, अभवत् became.

With omens that proved to be right and for good reasons and from the words of the sages (charanas), Hanuman felt happy.