Is leaving the mosque out of necessity among the things that invalidate i'tikaf (spiritual retreat in the mosque)?

Question:
May Allah reward you, Honorable Shaykh. The question is frequent among the brothers who are in i'tikaf (spiritual retreat in the mosque). They ask about leaving; some ask about taking food, others about taking a bath, others about making a phone call, and others about attending to their personal affairs. Does any of this invalidate the i'tikaf (spiritual retreat in the mosque)? Please inform us. May Allah reward you with good.

Answer:
I'tikaf (spiritual retreat in the mosque) means staying and remaining in the mosque, and one does not leave except for necessary needs, such as bringing in food if one does not have someone to bring him his food and drink. The drink, praise be to Allah, is available in the mosque, but the food is not. Also, for wudu' (the ablution for prayer) and purification, a person leaves to relieve himself and for purification. He leaves for purification and wudu' (the ablution for prayer). Beyond that, he does not leave his place of i'tikaf (spiritual retreat in the mosque). Yes.