Sayyiduna Ibn Abbas (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) said: "If I were to stone anyone without evidence, I would have stoned such-and-such a woman, from whom suspicion has become apparent in her appearance, her manner of speech, and those who come in to visit her."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11458