In particular, he preached against the veneration of Muslim saints, such as Zayd ibn al-Khattab, the brother of the second Muslim Caliph Omar, whose tomb was located in Uyayna and was venerated by locals.
Though Vadalov played no role in the 1999 Dagestan incursion led by Shamil Basayev and Ibn al-Khattab, following Russia's re-invasion of Chechnya that autumn he joined Khattab's Arab Mujahideen in Chechnya.
In 1998 Velijanov attended a military training camp in Chechnya ran by the legendary field commander Khattab.
He was also the father of Umar ibn al-Khattab, who would later become Muslim and is regarded by Sunni Muslims as the second "Rightly guided Caliph" (Arabic "Rashidun"), thus he was a Sahaba's ancestor.
In 1997 his father expelled him from the house and he moved to Chechnya, where he became an Avar interpreter of Arab warlord Khattab and the rogue Chechen field commander Shamil Basayev during their abortive Invasion of Dagestan in 1999.
His grave was purportedly located just north of modern-day Riyadh until the 18th century when it was levelled to the ground by Muhammad ibn Abd al-Wahhab, who claimed that it had become an object of idolatry.
Land disputes include the sale of St. John's property in the Christian quarter on April 11, 1990, the transfer of fifty dunams near Mar Elias monastery, and the sale of two hotels and twenty seven stores on Omar Bin Al-Khattab square near the Church of the Holy Sepulchre.
His father, Sheikh Umar, was believed to be a direct descendant in the seventeenth generation of the second godly Caliph Umar ibn al-Khattab, therefore male members of this family also bore the famous title of Khoja (Khwaja).
Umar's Assurance of safety to the people of Aelia, known as al-ʿUhda al-ʿUmariyya, a 637 agreement between the second Caliph Umar ibn al-Khattab and Sophronius of Jerusalem, the Patriarch of Jerusalem
"The Four Friends", a term used in Sunni Islam to refer to the Rashidun, the first four Caliphs (namely Abu Bakr, Umar ibn al-Khattab, Uthman ibn Affan and Ali ibn Abi Talib)
Magomed Khashiev (10 October 1977 – 17 April 2004), also known as "Sokhib" and "Khattab", was the Emir of the Sunzhensky District and a militant in the Russian federal subjects of Ingushetia and Chechnya.
Khalilov came to the attention of the authorities in 1998 when he married the sister of the foreign mujahideen commander Ibn al-Khattab's ethnic Dargin wife; he moved to her home village of Karamakhi, which acquired notoriety in the summer of the same year, when its residents introduced Sharia law and declared an Islamic state.
Palestinian historian Aref al-Aref says local legend attributes this Umar ibn al-Khattab who ordered Arab general Amr ibn al-'As to build a mosque next to every church in lands conquered by the Muslims.
According to ‘Umar ibn al-Khaṭṭāb, “wine is prepared from five things: raisins, dates, wheat, barley, or honey,” while Anas ibn Malik mentions wines made from at least four different kinds of dates.