It wasnarrated from Anas bin Malik that the Messenger of Allah (ﷺ)wentout and saw some people praying while sitting down. He said:
"Theprayer of one who sits down is equivalent to half of the prayer ofonewho stands." (PT)
English reference (PT): Vol. 1, Book 5, Hadith 1230 (PT)
Arabic reference (PT): Book 5, Hadith 1288 (PT)