First Class requirement 10 is related to inviting and welcoming others. Scouts invite a friend to come to a Scout activity.
10. Tell someone who is eligible to join Scouts BSA, or an inactive Scout, about your Scouting activities. Invite this person to an outing, activity, service project, or meeting. Provide information on how to join, or encourage the inactive Scout to become active. Share your efforts with your Scoutmaster or other adult leader.
Helps for this requirement are listed below.