C. F. Keil and Franz Delitzsch on Psalms 53:1

Psa 53:1

The well-grounded asyndeton השׁהיתוּ התעיבוּ is here dismissed; and the expression is rendered more bombastic by the use of עול instead of עלילה. עול (the masculine to עולה), pravitas, is the accusative of the object (cf. Eze 16:52) to both verbs, which give it a twofold superlative attributive notion. Moreover, here השׁחיתו is accented with Mugrash in our printed texts instead of Tarcha. One Mugrash after another is contrary to all rule.