Rasarnavasudhakara 2.61

2.61

atha (8) śaṅkā-
śaṅkā cauryāparādhādyaiḥ svāniṣṭotprekṣaṇaṃ matam |
tatra ceṣṭāmuhuḥ pārśva-darśanaṃ mukha-śoṣaṇam ||

Now, (8) Apprehension (śaṅkā):
Apprehension is considered the anticipation of harm to oneself through theft, transgression, and the like.
The physical actions in it are: constantly looking to the side, dryness of the mouth,