Put that egg or the next ones in the nesting box for the day. Chickens are curious and they will check on the egg. They will learn where they go.
My chickens are pets and they know and respond to their names so this worked for me:
My first egg laid was laid on the ground... I lectured the whole flock... I gathered them together and told them all "You can't lay eggs on the ground. People will step on them. Be a good momma hen and lay your eggs in the nesting box." Only one of the 8 wasn't looking at me at the time (she was guilty). After this little lecture, I never had an issue again