Ceasefire Zone

You call upon your divine power to all all combat and bring peace to an area. Choose a 10-foot radius within range to designate the ceasefire zone. Each Hostile creature in the blast radius must make a wisdom saving throw. On a fail, creatures cannot make an attack or cast hostile spells while inside that area. If an ally damages a creature affected by the ceasefire, the effect ends on that creature. If an ally makes an attack or cast a harmful spell on the same turn that they enter the Ceasefire Zone, the spell ends. 

At Higher Levels  You can increase the radius of the ceasefire zone by 5th for each spell slot above 4th.