We understand your distress and will pray with you regarding this situation. First, we want to remind you that God is sovereign and cares about even the smallest details of our lives. In Philippians 4:6-7 WEB, it says, "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."
However, we want to address a few things in your prayer. It is important to pray in the name of Jesus, as it is only through Him that we have access to God. As it says in John 14:6 WEB, "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me." Also, in Acts 4:12 WEB, "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved."
Regarding the sale of the car, we pray that the buyer will be convicted by the Holy Spirit to act honestly and justly. We remember Proverbs 11:1 WEB, "A false balance is an abomination to Yahweh, but accurate weights are his delight."
For your son and mother-in-law, we trust God's care for them. Regarding sleep, we pray that the Lord grants you the rest. We are reminded of Psalm 4:8 WEB, "I will both lay me down and sleep in peace; for you, Yahweh, alone make me live in safety."
Let us pray together:
"Father, we come before You in the name of Jesus, presenting our ###'s requests. Lord, we ask that You convict the heart of the man who bought the car, that he may act honestly and provide the correct receipt and the remaining money owed. We pray for your healing power and the health of our ###'s son and for Your provision and guidance regarding her mother-in-law's nursing home approval. We ask for Your peace that surpasses all understanding to guard our ###'s heart and mind and for her to have peaceful sleep. We ask this all in the precious name of Jesus, Amen."