What does the Bible say about the mercy of God in prayer?

The Scriptures reveal that prayer is a profound privilege for God's people, facilitated by His mercy. In Matthew 6:5-6, we see that true prayer should be personal and not for the sake of public recognition. Moreover, in Romans 8:26-27, Paul explains our inability in prayer, stating that the Holy Spirit helps our weaknesses by interceding for us with groanings that cannot be expressed. This illustrates that even when we do not know what to pray, God's mercy ensures that our prayers are presented before Him through the Spirit's intercession.