Here is a sample prayer for siblings that you can use as a guide:
Heavenly Father,
I pray for my siblings today. Please bless them and keep them safe.
I ask that you would bring them your peace and joy, and help them to feel your love.
I pray for unity and harmony within our family, that we may support and encourage one another.
Please give us patience and understanding as we navigate the ups and downs of life together. Help us to be there for one another, and to be a source of love and comfort.
In your holy name I pray, Amen.