Verses with the word cursing in the New Testament (3 verses):

Romans 3:14
Whose mouth is full of cursing and bitterness:

Hebrews 6:8
But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.

James 3:10
Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be.