Godspeed

бог в по́мощь

box v pómoščʹ

(used to express the wish that the outcome of a person's actions be positive for them)

с бо́гом

s bógom

(used to express the wish that the outcome of a person's actions be positive for them)

скатертью дорога

skatertʹju doroga

(wishing of someone a speedy journey, or success, especially at a parting; a statement expressing this)