Does a slight bowing of the leg during Rukūʿ, or a part of the feet not touching the ground, affect it?

The obligatory limit for bowing (rukūʿ) is to bend so that the palms can be placed on the knees, accompanied by tranquility (ṭumaʾnīnah). The inclination of the leg or the lifting of part of the foot from the ground does not affect the validity of the bowing, but the worshipper should be in their usual state without artificiality. Jurists have differed on the permissibility of a worshipper standing on the tips of their toes or their heels without an excuse.