Is this homebrew cantrip balanced? Water beam

I made a cantrip and I don’t know if it’s super OP or on the weak side so I want your opinion to make sure it’s balanced

1d4 force damage

Casting time: 1 action

Range: 30 feet

Duration: instantaneous

Components: V,S

Classes that know: Druid, Wizard, Sorcerer

The user shoots a geyser of water at the opponent in a 30 by 5 foot beam. Any creature that gets hit by this beam must make a dc 13 strength saving throw or take 1d4 force damage, and be knocked prone. If the strength save is a success, they only take the damage and don’t get knocked prone.

I got my inspiration from the decanter of endless water, and want your opinion