परोक्षे कार्यहन्तारं प्रत्यक्षे प्रियवादिनम्। वर्जयेत्तादृशं मित्रं विषकुम्भं पयोमुखम्।। Avoid him who talks sweetly before you but tries to ruin you behind your back, for he is like a pitcher of poison with milk on top.