en_tn_condensed/jdg/02/03.md

So now I say, 'I will not ... trap for you.'

"So now I tell you that I will not ... trap for you.'"

become thorns in your sides

"cause you trouble"

thorns

sharp pieces of wood up to 7 centimeters long that stick out from some plants

their gods will become a trap for you

This refers to a hunter's trap that catches an animal and causes it harm.