At Paṅkadhā 5.3

5.3

Satthā hissa vaṇṇaṃ bhaṇatīti aññe naṃ bhikkhū bhajeyyuṃ, ye naṃ bhajeyyuṃ tyāssa diṭṭhānugatiṃ āpajjeyyuṃ, yyāssa diṭṭhānugatiṃ āpajjeyyuṃ tesaṃ taṃ assa dīgharattaṃ ahitāya dukkhāyāti.

Because, hearing that I praised that mendicant, other mendicants might want to keep company with them. Then they might follow their example, which would be for their lasting harm and suffering.