Ibn Umar, full name Abdullah ibn Umar ibn al-Khattab, was a prominent companion of the Prophet Muhammad and the son of the second caliph, Umar ibn al-Khattab. Born in 610 CE in Mecca, he was known for his deep knowledge of Islamic teachings and his commitment to following the Prophet's traditions. He played a significant role in the early Islamic community and is credited with narrating many hadiths, or sayings of the Prophet. Ibn Umar was also known for his piety and adherence to Islamic law, making him a respected figure among Muslims throughout history.