How do we know that God defends His people?

In Isaiah 3, God explicitly speaks to His covenant people, stating that it shall be well with the righteous. This reassurance is grounded in the understanding that their righteousness is not from themselves but is a gift from God, as seen in Romans 4:5 where faith is credited as righteousness. God's faithfulness to His elect is part of His eternal covenant to defend and protect them, as illustrated by verses which emphasize His role as a protector and advocate. This promises believers in every generation that, even amid trials, God will affirm their status as His beloved, ensuring they are never forsaken during times of judgment.