5e SRD:Animal Friendship

This spell lets you convince a beast that you mean it no harm. Choose a beast that you can see within range. It must see and hear you. If the beast's is 4 or higher, the spell fails. Otherwise, the beast must succeed on a saving throw or be  by you for the spell's duration. If you or one of your companions harms the target, the spells ends.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can affect one additional beast for each slot level above 1st.