Tidal Restraint

Choose a humanoid that you can see within range. The target must succeed on a Strength saving throw or be restrained for the duration. At the end of each of its turns, the target can make another Strength saving throw. On a success, the spell ends on the target.

In addition, when within 20ft of a water source, targets gain disadvantage on throws made to remove the restrained

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can target one additional humanoid for each slot level above 3rd. The humanoids must be within 30 feet of each other when you target them.