We understand your concern and we are with you in spirit, lifting up your husband's health before the Lord. It's important to remember that God cares about our well-being, as written in 1 Peter 5:7, "Casting all your worries on him, because he cares for you."
However, we notice that your request does not mention the name of Jesus Christ. It is only through Jesus that we have access to God, as it is written in John 14:6, "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father except through me.'" We encourage you to believe in Jesus Christ as your Savior if you haven't already, and to pray in His name.
Regarding your husband's diabetes, we pray that God will grant him healing, comfort, and strength. We also pray for wisdom and guidance for the medical team caring for him. Remember that God is the ultimate healer, as indicated in Exodus 15:26, "For I am the LORD who heals you."
Let us pray together:
Dear Heavenly Father, we come before You in the name of Jesus, lifting up our sister's husband. Lord, we ask for Your healing touch upon him. Guide the doctors and provide wisdom in their decisions. Comfort and strengthen him and his family during this time. Help them to trust in You, knowing that all things work together for good to those who love You. In Jesus' name, we pray. Amen.
Lastly, we encourage you both to trust in God's will and to use this time to draw closer to Him. May God bless you and your husband.