Psalms 52:7

Lo, [this is] the man [that] made not God his strength
The Targum renders it, "that made not the Word of the Lord his strength". These are the words the righteous would say, when they should see the destruction of Doeg: see the man, the mighty man, and his end; what all his ill gotten honour and riches are come to; and what his wickedness, deceit, and cruelty, have brought upon him. The righteous make the Lord their strength, put their trust in him, in whom is everlasting strength; do all they do in his strength; fly to him as their "strong hold", as the word ^F2 may be rendered; thither they run, and are safe: but the rich man's wealth is his strong city, ( Proverbs 18:10 Proverbs 18:11 ) ; there he thinks himself safe, and places his confidence in it, as follows:

but trusted in the abundance of his riches; (See Gill on Psalms 49:6); so the antichristian whore is represented as boasting of her riches and honour, and trusting in them, that they would always continue, ( Revelation 18:7 ) ; like the fool in ( Luke 12:19 Luke 12:20 ) ;

[and] strengthened himself in his wickedness;
encouraged and hardened himself in sin, gave up himself to it; and, by art obstinate continuance in it, strengthened the vicious habits contracted; stretched out his hand against God, and strengthened himself against the Almighty; went on in a daring manner, promising himself impunity; and as if his wickedness was his strength, his safeguard and protection: or in his mammon, his wealth and substance; as the Targum interprets it; and so R. Saadiah Gaon ^F3, and with which the Syriac version agrees; and then the sense is the same with the other clause. But, alas! what are all such forces of strength, when wrath comes forth from the Lord of hosts? ( Job 36:18 Job 36:19 ) ( Proverbs 11:4 ) .