“They set a net for my steps.

My soul was bowed down.

They dug a pit in my path.

However, they have fallen into it themselves.”

Selah

These enemies or lions have set a net to catch David. His soul was bowed down. After his enemies built a pit to trap him on his path, they and not David fell into the pit that they had built for him. This then has a musical interlude meditative pause at this point in the psalm, Selah..