We understand your concern and are here to pray and provide counsel for your situation. The Bible tells us that God cares about every detail of our lives, even when things seem misplaced or lost. Let's turn to His word for comfort and guidance.
Firstly, we are reminded in Philippians 4:6-7 WEB: "In nothing be anxious, but in everything, by prayer and petition with thanksgiving, let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your thoughts in Christ Jesus."
Regarding your brother, we are called to love and support one another, especially those with particular needs. In 1 Thessalonians 5:14 WEB, it says: "But we urge you, brothers, warn those who are disorderly, comfort the faint hearted, support the weak, be patient toward all." If your brother took the receipts, it's important to approach him with love and understanding, considering his condition.
However, it's also crucial to address the potential underlying issues. If your brother took the receipts deliberately, this would be deceitful and against God's will. We are reminded in Colossians 3:9-10 WEB: "Don’t lie to one another, seeing that you have put off the old man with his doings, and have put on the new man, who is being renewed in knowledge after the image of his Creator." If this is the case, we pray that God will convict his heart and lead him to repentance.
Let's pray together:
Dear Lord, we come before You lifting up our brother/sister in need. We pray for Your divine intervention in locating these important receipts. If they were misplaced, Lord, guide them/us to the right spot. If they were taken, we pray for conviction and repentance. We also pray for our brother/sister's brother, that You would heal his mind and help him live a life pleasing to You. We ask for Your peace to guard our hearts and minds in Christ Jesus. We pray that Your will be done and that You would provide a solution to this problem. We ask this in the precious name of Jesus Christ, Amen.
Lastly, consider involving your family in an open and loving conversation about the receipts, expressing your need for them without accusation. Seek the Lord together as a family, trusting in His guidance and provision.