Yes, you must show mercy to other people. If you do not show mercy, then God will not show mercy to you when he judges you. But the person who shows mercy can stand without fear when he is judged.
Then Jael reached out
and took the tent peg.
Her right hand reached for the hammer
that a worker would use.
Then she used the hammer on Sisera!
She hit him on the head
and made a hole through his temple!
Look, there is Sisera’s mother,
looking out the window,
looking through the curtains
and crying.
“Why is Sisera’s chariot so late?
Why can’t I hear his wagons?”