It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: In Paradise, there is a tree under whose shade, if a rider travels for a hundred years, he would still not be able to cross its shade.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13458
Hadith Gradingحکم دارالسلام:حديث صحيح، خ: 3251، وهذا إسناد قوي