The Messenger of Allah (peace and blessings be upon him) said: "In Paradise, there is a tree such that if a rider of a well-bred, swift horse were to ride under its shade for a hundred years, he would still not be able to cross it." This hadith is narrated from Sayyiduna Abu Sa'id al-Khudri, Sayyiduna Abu Hurairah, Sayyiduna Sahl bin Sa'd, and Sayyiduna Anas bin Malik (may Allah be pleased with them).