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."
إن 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) and Ahmad (22304) both narrated it through the route of Yahya bin Harith, from Qasim Abu Abdul-Rahman, from Abu Umama, who related it. The wording given is that of Abu Dawud.Its chain of transmission is hasan, on account of the discussion surrounding Qasim, who is Ibn Abdul-Rahman al-Shami al-Dimashqi. There is disagreement about him. Ibn Main, Ajli, Tirmidhi, and others considered him reliable, while some others weakened him on the grounds that he has objectionable narrations. It has been said that these objectionable narrations come from the weak narrators who transmitted from him, but not from the reliable ones who transmitted from him. The conclusion regarding him is that his chain of transmission is hasan so long as he does not narrate something that is objected against him.