It is narrated from Hazrat Abu Basrah (may Allah be pleased with him) that once I met Hazrat Abu Hurairah (may Allah be pleased with him), he was going towards the mosque of Toor to offer prayer. I said to him, if I had met you before your departure, you would never have undertaken this journey, because I heard the Prophet (peace and blessings of Allah be upon him) say: Mounts should not be saddled except for visiting three mosques: Masjid al-Haram, my mosque, and Masjid al-Aqsa.
Hadith Referenceمسند احمد / من مسند القبائل / 27230
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن