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I would like to see any scriptures related to this topic.
It is not necessary to pray on your knees before our God and Father...
1 Chronicles 17:16 And David the king came and SAT before the LORD, and said, Who am I, O LORD God, and what is mine house, that thou hast brought me hitherto?
I would love to remember those in military service who have lost knees as they risk their lives and keep praying as the Spirit of God moves them to do so!