Collocations for mercy - noun

divine, infinite
God's infinite mercy

great
tender
I left him to the tender mercies of his mother.

ask for, beg for, plead for, scream for
deserve
obtain, receive
extend, give (sb), grant (sb), have, show (sb)
The mission of the church is to extend mercy to the needy.
God have mercy on us!
They showed no mercy to their captives.

dash (BrE), mission
a mercy mission to deliver medical supplies and equipment

killing

at the mercy of
We're at the mercy of the weather.

without mercy
The terrorists are completely without mercy.

mercy for
There shall be no mercy for my enemies.
He asked for mercy for the crimes he had committed.

be grateful for small mercies, be thankful for small mercies
I suppose we should be grateful for small mercies.