It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever walks to an obligatory prayer in congregation, it is like a Hajj; and whoever walks to a voluntary prayer, it is like a complete Umrah."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7547