Adam Clarke on Psalms 53:1

The fool hath said in his heart - The whole of this Psalm, except a few inconsiderable differences, is the same as the fourteenth; and, therefore, the same notes and analysis may be applied to it; or, by referring to the fourteenth, the reader will find the subject of it amply explained. I shall add a few short notes.

Have done abominable iniquity - Instead of עול avel, evil or iniquity, eight of Kennicott's and De Rossi's MSS. have עלילה alilah, work, which is nearly the same as in Psa xiv.