Mudgalapurana 8.50.26

8.50.26

khaṃ. 8 a. 50 pāna 117) muṣasteye samākhyāto dhātuḥ sa eva mūṣakaḥ |
vyāpakaścauravat sarvān bhuṅkte mohya hṛdi sthitaḥ ||

Section 8, Chapter 50, Page 117) The root *muṣ* is said to mean 'in stealing'; that very [root yields] *mūṣaka* ('mouse');
and like a thief, the all-pervading one, dwelling in the heart, enjoys all [things] after deluding [them].