Answer
Muhammad al-Baqir was the eldest son of Ali al-Sajjad, the fourth Shia Imam. Born in Medina in 676 CE, Muhammad al-Baqir is renowned as the fifth Shia Imam and is highly revered for his extensive knowledge and piety. He played a pivotal role in shaping Shia theology and jurisprudence, earning the title "al-Baqir" (the one who unveils knowledge) due to his profound understanding of Islamic sciences.