Spare the Dying

Source: D&D 5.2 SRD Spells

Necromancy Cantrip (Cleric, Druid)

• Casting Time: Action
• Range: 15 feet
• Components: V, S
• Duration: Instantaneous

Choose a creature within range that has 0 Hit Points and isn't dead. The creature becomes Stable.

Cantrip Upgrade. The range doubles when you reach levels 5 (30 feet), 11 (60 feet), and 17 (120 feet).