Siṅgālasutta

Suttapiṭaka · Dīghanikāya · Pāthikavagga · Vol. 11 · Section 186

[186] Householder's son, these four should be known as enemies in the guise of friends: the one who takes everything should be known as an enemy in the guise of a friend; the one who is all words should be known as an enemy in the guise of a friend; the flatterer should be known as an enemy in the guise of a friend; the companion in ways of ruin should be known as an enemy in the guise of a friend.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.