Stay away from a fool

वरं पर्वतदुर्गेषु
भ्रान्तं वनचरैः सह ।
न मूर्खजनसम्पर्कः
सुरेन्द्रभवनेष्वपि ॥

- नीतिशतकम्

It is better to live with wild beasts wandering in the mountains, than with fools even in the comfortable and heavenly halls of the Lord of Gods.

Stay away from a fool.
Never argue with a fool; people might not be able to tell the difference.