Knees
The meaning depends upon what you associate most with your knees. Do you kneel in prayer, have you been forces onto your knees by hard events, were you begging for something or to someone for something? Do you view them as an idiom such as the bees knees; sitting on my knees; crawling on hands and knees; covering my knees; on my knees; knee jerk reaction; my knees knocking; knee high to a grasshopper; bring to your knees; weak at the knees.
Try ‘being your knees, as described in https://dreamhawk.com/dream-encyclopedia/acting-on-your-dream/#BeingPerson