Psalms 7:16

His mischief shall return upon his own head
That which he conceived and devised in his mind, and attempted to bring upon others, shall fall upon himself, as a just judgment from heaven upon him;

and his violent dealing shall come down upon his own pate;
referring to the violence with which Saul pursued David, which would be requited to him, and of which he prophesied, ( 1 Samuel 26:10 ) .