Valmiki Ramayana Yuddha Kanda Sarga 17 Shloka 63

शठः one with deceitful feeling, अशङ्कितमतिः without any expression of suspicion, स्वस्थः on his own, नपरिसर्पति: not going about, अस्य: his, वाक् च: even his talk, दुष्टा: looks, नास्ति: not, तस्मात् therefore, मे: to me, संशयः suspicion, नास्ति: not there.

"One who is with deceitful feeling will not come without an expression of suspicion. He has come on his own and even his talk and looks are not suspicious to me."