4 When they could not come near to him for the crowd, they removed the roof where he was. When they had broken it up, they let down the mat that the paralytic was lying on.
Mark 2:4 Cross References - WEB
Deuteronomy 22:8
8 When you build a new house, then you shall make a railing around your roof, so that you don’t bring blood on your house if anyone falls from there.
Luke 5:19
19 Not finding a way to bring him in because of the multitude, they went up to the housetop, and let him down through the tiles with his cot into the middle before Jesus.