Cablegram of Congratulation to Reza Shah Pahlevi.
His Imperial Majesty Reza Shah Pahlevi Shah of Persia, Teheran
The American people join with me in extending sincere felicitations on this your Majesty's birthday and in wishing for your Majesty health and happiness for many years to come.
Franklin D. Roosevelt, Cablegram of Congratulation to Reza Shah Pahlevi. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/207885