The Forgotten Books of Eden, by Rutherford H. Platt, Jr., [1926], at sacred-texts.com

ODE 27.

The human body makes a cross when a man stands erect in prayer with arms outstretched.

1 I stretched out my hands and sanctified my Lord:
2 For the extension of my hands is His sign:
3 And my expansion is the upright tree [or cross].