I will lift up my hands in thy name. — Psalm 63:4
It has been a long practice of God’s people from the Old to the New Testament to lift their hands in supplication and praise to the Lord. In prayer, it shows a humility and neediness to the giver of all things and the hands are extended as a show of entreaty and request from the Lord. In praise, it is a show of honor and homage to our Savior and Heavenly Father.
When the songs of Zion are being sung, lifted hands in the air signify praise and honor to the Lord. It can be a sign of affirmation or signify a prayer of neediness and desire for more of what is being sung or spoken.