There is no company with a fool.

Carañce nādhigaccheyya, seyyaṃ sadisamattano;

Ekacariyaṃ daḷhaṃ kayirā, natthi bāle sahāyatā.

If the wayfarer does not meet a wise companion, let him go alone.

There is no company with a fool.

Dhammapada, 61.