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

Acts 13:33
God hath fulfilled the same unto us their children, in that he hath raised up Jesus again; as it is also written in the second psalm, Thou art my Son, this day have I begotten thee.

Acts 13:35
Wherefore he saith also in another psalm, Thou shalt not suffer thine Holy One to see corruption.

1 Corinthians 14:26
How is it then, brethren? when ye come together, every one of you hath a psalm, hath a doctrine, hath a tongue, hath a revelation, hath an interpretation. Let all things be done unto edifying.