The term Godspeed is sometimes used in order to wish someone success and safety, especially if they are about to go on a long and dangerous journey. I know you will join me in wishing them Godspeed. used to wish someone good luck, especially before a journey (God speed you )
A Christian substitute to the otherwise sacrilegious "good luck", which implies that anything can be random and out of the hands of God. Used to express concern and prayer for someone