Al-Matalib al-'Aliyah 648 — The Duha prayer

It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that she used to pray eight rak'ahs of the Duha prayer sitting. It was said to her: "Sayyidah Aishah (may Allah be pleased with her) prays it as four rak'ahs!" She said: "Indeed Sayyidah Aishah (may Allah be pleased with her) is a young woman, and the Messenger of Allah (peace and blessings be upon him) said: 'The reward of one who prays sitting is half of the reward of one who prays standing.'"
Takhrij and grading: In the chain of this narration there is an unnamed (mubham), i.e. unknown, narrator; however, the original Prophetic statement about the lesser reward for praying sitting is found in Sahih al-Bukhari (1115) and elsewhere.