´It was narrated that ‘Aishah said:` “The Prophet (ﷺ) used to recite Qur’an sitting down, then when he wanted to bow he would stand up for as long as it takes a person to recite forty Verses.”
Hadith ReferenceSunan Ibn Majah / Establishing the Prayer and the Sunnah Regarding Them / Hadith: 1226
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم