The Messenger of Allah ﷺ said, "Whoever leaves his home in a state of purity heading to a prescribed prayer, his reward is like that of a pilgrim in the state of ihram. Whoever leaves to perform the Duha prayer, with no other purpose than that, his reward is like that of one performing Umrah. And a prayer followed by another prayer with no idle talk between them is a record inscribed in Illiyyun."
أن رسول الله ﷺ قال: من خرج من بيته متطهرا إلى صلاة مكتوبة فأجره كأجر الحاج المحرم، ومن خرج إلى تسبيح الضحى لا ينصبه إلا إياه فأجره كأجر المعتمر، وصلاة إثر صلاة لا لغو بينهما كتاب في عليين.
Abu Dawud (558) narrated it from Abu Tuba, who said, Haytham bin Humayd narrated to us, from Yahya bin Harith, from Qasim Abu Abdul-Rahman, from Abu Umama, and he mentioned something similar.Its chain of transmission is hasan, due to the discussion surrounding Qasim bin Abdul-Rahman Shami Dimashqi, though his hadith is hasan.