They lean on the web, but it gives way; they cling to it, but it does not hold.
OJBHe shall lean upon his bais, but it shall not stand, he shall cling to it, but it shall not hold.
T4TIf they lean against a house (OR, trust in their wealth; OR, lean on a spider web), it does not ◄endure/protect them► [LIT]; they cling to things to be protected, but those things do not remain firm.