Casting time: 1 Action
Components: V, S
Duration: Concentration, up to 1 hour
It is a spell which is available at Xanathar’s Guide To Everything, As per this spell your magic shall deepens a creature’s understanding of its own talent. Here you do touch one of your willing creatures and also gives it expertise in a skill of your choice; unless until the spell ends, the creature shall double its proficiency bonus for the ability checks it makes that utilize the selected skill.
have you read about divine word spell 5e ?
However you should select a skill in which the target is the proficient and also that is not already benefiting from an effect, like the Expertise which doubles its proficiency bonus.