Tafsir Ibn Kathir (abridged)
The gathering of the People of Paradise, and the exchange between One of Them and His Counterpart in
Allah tells us how the people of Paradise will turn to one another, asking one another about their situation, how they were in this world and what they suffered. This is part of their conversation when they get together to converse and drink, sitting on their thrones, servants coming and going, bringing all kinds of good food, drink, clothes and other delights no eye has seen, no ear has heard, never having comprehend the mind of man.
قَالَ قَآئِلٌ مِّنْهُمْ إِنِّى كَانَ لِى قَرِينٌ
(A speaker of them will say: "Verily, I had a companion...") Al-`Awfi reported that Ibn `Abbas, may Allah be pleased with him said, "This refers to an idolator man who had a companion among the believers in this world."
Continue reading the tafsir of ayahs 50–61