Source: Player's Handbook

2nd-level transmutation

Casting Time: 1 bonus action
Range: Touch
Components: V, S
Duration: Concentration, up to 1 hour

You touch a nonmagical weapon. Until the spell ends, that weapon becomes a magic weapon with a +1 bonus to attack rolls and damage rolls.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the bonus increases to +2. When you use a spell slot of 6th level or higher, the bonus increases to +3.

Spell Lists. Artificer , Paladin , Ranger (Optional) , Sorcerer (Optional) , Wizard