April 11

In the Súriy-i-Sabr,[Surih of Patience] revealed as far back as the year 1863, on the very first day of His arrival in the garden of Ridván, He thus affirms: “God hath sent down His Messengers to succeed to Moses and Jesus, and He will continue to do so till ‘the end that hath no end’; so that His grace may, from the heaven of Divine bounty, be continually vouchsafed to mankind.” 
(Shoghi Effendi, ‘God Passes By’)