Answer By Dr Zakir NaikNumber one, is leaving the mosque without a valid reason. As I mentioned in my earlier answer unless it be for relieving one self, or is to got for call of nature for urination or for defecation or for doing Wudhu or having a bath or Ghusl or if he, no one can get food and if he has to go out to get food, these are the only conditions. As a last resort it's allowed. So unless it's for a valid reason, a person cannot leave the mosque. As I mentioned earlier, but now a days Alhumdulillah, since there are toilets and bathrooms attached to the mosque, this requirement itself is very occasionally. So number one is, if a person leaves the mosque without a valid reason the Ietikaaf is invalidated.Number two, if a person has sexual intercourse with his wife. As Allah says in the Qur'an in Surah Baqarah, Chapter No. 2, Verse No. 187, that,"Do not associate with your wives while you are in retreat in the mosque." While doing Ietikaaf in the mosque don't associate with your wife. So all the scholars, they unanimously agree that f you have a sexual relation with your wife, the Ietikaaf is invalidated. But if the wife touches you, just normally, you know, may be she comes to give you food and it touches then its no problem at all. But, if your wife touches with passion or you touch her with passion or you embrace or kiss, all the scholars unanimously agree that it is Makrooh, it is detestable. Some scholars say that it will break the Ietikaaf, invalidate the Ietikaaf. So here's there difference of opinion, whether embracing, or whether touching with passion invalidates Ietikaaf or not. Because this verse of Surah Baqarah, Chapter No. 2, Verse No. 187, the word 'Mubaashera', that do not associate with your wife. Here if it's specific meaning that, so it means only sexual relationship. So those scholars who says that it does not invalidate the Ietikaaf, they take it in specific sense, only sexual relationship. But touching with passion and kissing and embracing it is Makrooh, it is detestable but does not invalidate the Ietikaaf. But those who take this word as general, so they say, that besides sexual relationship, even embracing the wife or touching with passion, it invalidates the Ietikaaf. Allahu Waalam. Allah knows the best.
The third thing that invalidates the Ietikaaf it is menstruation and post natal bleeding, post child birth bleeding.
