It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever goes out of his house in a state of purity (with ablution), his reward is like that of a pilgrim in ihram for Hajj; and whoever walks to the Duha prayer, with nothing but that tiring him, his reward is like that of one performing Umrah."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7724