Can it be said that what diverted the prohibition of "käft" (tucking up clothes) during prayer from being about corruption was the action of Ibn Abbas and Abu Rafe', and does the prohibition not include underwear or any garment that does not touch the ground during prostration?

The hadiths mentioned are suitable for citing as evidence that Ibn Abbas and Abu Rafe' did not consider the prayer of one who tucked up his garment or hair to be invalid. Some scholars consider this act to be forbidden, but they do not deem the prayer invalid. Al-Tabari reported the consensus of the Ummah on the validity of the prayer despite the prohibition. Among the Salaf from whom this was narrated are Ali, Ibn Mas'ud, Hudhayfah, Ibn Umar, and Abu Hurayrah. Ibn Al-Mundhir stated that this is the view of most scholars, with the exception of Al-Hasan Al-Basri, who said that the prayer must be repeated. Scholars have agreed on the prohibition of praying with one's garment tucked up or hair braided, and this is a disliking of tanzih (discouraged but not forbidden). If one prays in such a state, they have acted improperly, but their prayer is valid.