Valmiki Ramayana Bala Kanda Sarga 76 Shloka 22

स: that, जामदग्न्य: Parasurama, तपसा by asceticism, अर्जितान् earned, स्वान् his own, लोकान् worlds, रामेण by Rama, हतान् struck, दृश्य having seen, आशु speedily, पर्वतोत्तमम् excellent among mountains, महेन्द्रम् Mahendra, जगाम went.

Having witnessed the destruction of those regions earned by him through asceticism, the son of Jamadagni left for the best of mountains Mahendra.