Verses with the word forgetful in the New Testament (2 verses):

Hebrews 13:2
Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.

James 1:25
But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.