What is the duration of i'tikaf (spiritual retreat in the mosque)?

Question:
This questioner asks: Is i'tikaf (spiritual retreat in the mosque) from Maghrib (the sunset prayer) until the dawn of the second day, and then leaving the mosque?

Answer:
Yes, regarding i'tikaf (spiritual retreat in the mosque), we said that it has no minimum limit, and it is not sufficient. If one performs i'tikaf for a complete night from Maghrib to Fajr (the dawn prayer), he has achieved i'tikaf; he has achieved i'tikaf. 'Umar ibn al-Khattab (may Allah be pleased with him) vowed to perform i'tikaf for one night in the Sacred Mosque. He asked the Prophet (peace and blessings be upon him), and he told him: "Fulfill your vow." Is i'tikaf only at night, or only during the day, or is it at night and day? The latter is better. One intention is sufficient for i'tikaf; it is not necessary to intend it for every day. If one intends to perform i'tikaf for the last ten days, the intention at the beginning is sufficient; it is not necessary to renew the intention every day. Yes.