Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: Sayyiduna Umar (may Allah be pleased with him) had made a vow in the days of ignorance to perform i'tikaf for one night in Masjid al-Haram. He asked the Prophet (peace and blessings be upon him) about this, so he said: "Fulfill your vow." Its chain of narration is authentic.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: Sayyiduna Umar bin Khattab (may Allah be pleased with him) had made a vow in the days of ignorance that he would perform i'tikaf (spiritual retreat) for one night in Masjid al-Haram. When the era of Islam came, he asked the Prophet Muhammad (peace and blessings be upon him) about this matter, so he said: "Fulfill your vow." So Sayyiduna Umar (may Allah be pleased with him) performed i'tikaf for one night. Its chain of narration is authentic.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) said: "It is not obligatory for the person observing i'tikaf to fast, except if he makes (fasting) obligatory upon himself, then the ruling will be different." The Shaykh has transmitted this narration as a marfu' hadith, whereas other narrators have not transmitted it as a marfu' hadith.

Sayyidah Aisha (may Allah be pleased with her) narrates: The Noble Prophet (peace and blessings be upon him) said: "I'tikaf is only valid along with fasting." In narrating this, the narrator named Suwayh is unique.

Sayyiduna Hudhayfah (may Allah be pleased with him) narrates: I heard the Noble Prophet (peace and blessings be upon him) say: "Every mosque in which there is a muezzin and an imam, i'tikaf can be observed in it." The narrator of this narration, Dahhak, did not hear hadith from Sayyiduna Hudhayfah (may Allah be pleased with him).

Sayyiduna Ali (may Allah be pleased with him) said: "A person observing i'tikaf may participate in the Friday prayer, may attend a funeral, and may visit the sick."

Sayyiduna Ali (may Allah be pleased with him) said: "A person observing i'tikaf may visit the sick, attend funerals, go for Jumu'ah, and go to his house (but he cannot stay with them for long)."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates regarding Sayyiduna Umar (may Allah be pleased with him): He asked the Noble Prophet (peace and blessings be upon him) about the i'tikaf that was obligatory upon him, so the Noble Prophet (peace and blessings be upon him) instructed him: "He should perform i'tikaf and also fast." In narrating this report, the narrator named Ibn Badeel is unique, and he is weak.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrated this: Sayyiduna Umar (may Allah be pleased with him) said to the Noble Prophet (peace and blessings be upon him): "I had made a vow to observe i'tikaf for one day." So the Noble Prophet (peace and blessings be upon him) said: "Observe i'tikaf and also fast." I heard Shaykh Abu Bakr Nishapuri saying, he said: This hadith is munkar, because the reliable students of Amr bin Dinar did not narrate it, among whom are Ibn Jurayj, Ibn Uyaynah, Hammad bin Salamah, Hammad bin Zayd, and others, while its narrator Ibn Budayl is weak.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) used to observe i'tikaf during the last ten days of the month of Ramadan, and this practice continued in the same way until he passed away.