‏الإيمان : Hadeeth No:196 Abu Huraira narrated on the authority of Abu Bakr that the Messenger of Allaah (sallAllaahu alayhi wa sallam) said: Three are the persons with whom Allaah would neither speak on the Day of Resurrection, nor would He look towards them, nor would purify them (from sins), and there would be a tormentin...

‏الأيمان : Hadeeth No:4040 Ibn 'Umar heard Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: He who has to take an oath, he must not take oath but by Allaah. The Quraish used to take oath by their fathers. So he (the Prophet) said: Do not take oath by your fathers....