Prerequisite for Itikaf?

Answer By Dr Zakir Naik,As far as the pre-requisite for doing Ietikaaf is concerned, but natural, the person should be a Muslim, he should be sane, he should have reached puberty and he should not be in the state of Janabah, ceremonial impurity, he should not be sexually defiled, person should not be in the state of menstruation or post child birth bleeding and the person should be pure while doing Ietikaaf. And besides these three are two pillars of Ietikaaf, number one, that is the intention; his Niyaah should be seeking nearness to Allah (Subhanahu wa ta'ala) and seeking his reward. Number two, it should be done in a mosque, as Allah says in Surah Baqarah, Chapter No. 2, Verse No. 187, that,
"Associate not with your wives when you retreat in the mosque."