瑜伽師地論略纂 2.104

2.104

「無尋伺輪石」等者，皆是按摩調適之具，或以石等，從頭至足，次第輪之，令身調適；或復以輪，迴輪其身，以石搥等，打築其身，而取調適。此等體皆非尋伺，故名無尋伺。

Regarding 'rollers and stones free from vitarka and vicāra' and so forth: these are all instruments for massage and physical adjustment. Either one uses stones and the like to roll over the body sequentially from head to foot, making the body comfortable; or one uses rollers to rotate over the body, and stone pestles and the like to strike and pound the body to achieve comfort. Since the nature of these [objects] is entirely free of vitarka and vicāra, they are called 'free from vitarka and vicāra'.