C. F. Keil and Franz Delitzsch on Psalms 53:4

Psa 53:4

Here in the first line the word כּל־, which, as in Psa 5:6; Psa 6:9, is in its right place, is wanting. In Psa 14:1-7 there then follow, instead of two tristichs, two distichs, which are perhaps each mutilated by the loss of a line. The writer who has retouched the Psalm has restored the tristichic symmetry that had been lost sight of, but he has adopted rather violent means: inasmuch as he has fused down the two distichs into a single tristich, which is as closely as possible adapted to the sound of their letters.