It is narrated from Yahya bin Saeed (may Allah have mercy on him) that Sayyiduna Umar bin Khattab (may Allah be pleased with him) returned after offering the Asr prayer and met a person who was not present in the Asr prayer. He asked: What was the reason you stayed away from joining the congregation? He gave some excuse, then he (Umar) said: «طَفَّفْتَ» .
Imam Malik (may Allah have mercy on him) said: It is from «طَفَّفْتَ» «تَطْفِيْفٔ» . The Arabs used to say: «لِكُلِّ شَيْءٍ وَفَاءٌ وَ تَطْفِيْفٌ» .