John Gill Commentary Psalms 53:1

"The fool hath said in his heart, There is no God. Corrupt are they, and have done abominable iniquity; There is none that doeth good." — Psalms 53:1 (ASV)

The fool has said in his heart, [there is] no God
The Targum adds, "of whom is revenge"; or there is no God to punish and avenge the wicked;

corrupt are they ;
the Chaldee paraphrase is, "the wicked have corrupted their ways"; as all flesh had done in the old world, (Genesis 6:12);

and have done abominable iniquity ;
iniquity is the abominable thing that God hates, and makes men abominable in his sight; in (Psalms 11:1), it is read, "abominable worlds": the Targum paraphrases the words, "they are far from good, for iniquity is found in them"; see (Revelation 21:8Revelation 21:27);

[there is] none that does good; (See Gill on Psalms 14:1).