Potthakasutta 2.4

2.4

Ye kho panassa sevanti bhajanti payirupāsanti diṭṭhānugatiṃ āpajjanti, tesaṃ taṃ hoti dīgharattaṃ ahitāya dukkhāya.

If you associate with, accompany, and attend to them, following their example, it’ll be for your lasting harm and suffering.