Aspersions

You incite doubt into the mind of a humanoid that can hear you within range, by suggesting something that could be true. The target must make a Wisdom saving throw. On a success, the target disregards the idea. On a failure, the target is charmed for the duration. The saving throw is made with advantage if the target regards you or your companions as hostile. While charmed in this way, the target seriously considers the aspersion and will investigate to the best of their ability its validity. The urgency with which the target does so is at the DM’s discretion, depending on the target’s priorities, personality and the gravity of the aspersion. The spell ends if you or your allies deal damage to the target, the duration ends, or the target finds sufficient evidence to confirm, or reject the aspersion. 

At higher levels. If the spell is cast at 2nd level, the duration extends to 1 hour. If cast at 3rd level the duration extends to 1 day. Casting the spell at higher levels increases the duration by 1 day for each spell level above 3rd.