Rasarnavasudhakara 2.292

2.292

atha vismayaḥ-
lokottara-padārthānāṃ tat-pūrva-lokanādibhiḥ | 128
vistāraś cetaso yas tu vismayaḥ sa nigadyate |
kriyās tatrākṣi-vistāra-sādhūkti-pulakādayaḥ ||

Now, wonder:
Through seeing extraordinary things for the first time and the like, [128]
that expansion of the mind which occurs is called wonder.
The actions in that state are widening of the eyes, words of praise, horripilation, and the like.