Abu Uthman (may Allah have mercy on him) said: When Abu Bakrah (may Allah be pleased with him) and his two companions testified against al-Mughirah (may Allah be pleased with him), Ziyad came. Hadrat Umar (may Allah be pleased with him) said: Here is a man who, if Allah wills, will testify only to the truth. He said: I saw heavy breathing and an ugly sitting. Hadrat Umar (may Allah be pleased with him) asked: Did you see the kohl stick enter the kohl container? He said: No. So he gave the order concerning them (the three), and they were flogged.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20524