'Something' in the Bible

For if Abraham was justified by works, he has something to boast about, but not before God.

But "if your enemy is hungry, feed him; if he is thirsty, give him [something] to drink; for [by] doing this, you will heap up coals of fire upon his head."

I know and am convinced in the Lord Jesus that nothing [is] unclean of itself, except to the one who considers something to be unclean; to that person [it is] unclean.