One of the sahābah considered most knowledgeable in Tafsīr was

Abdullah b. Abbas was considered one of the Sahābah, or companions of the Prophet Muhammad (peace be upon him), who was most knowledgeable in Tafsīr (exegesis or interpretation of the Quran). Abdullah b. Abbas was a cousin of the Prophet Muhammad and was known for his deep knowledge and understanding of the Quran. He was especially skilled in interpreting the meanings of the verses and explaining their context and significance. The Prophet Muhammad (peace be upon him) himself prayed for him to be given understanding of the religion and knowledge of the Quran. Throughout his life, Abdullah b. Abbas remained dedicated to the study of the Quran and is considered one of the most important figures in Islamic scholarship. His extensive knowledge and expertise in Tafsīr earned him the title "The Great Interpreter of the Quran."