By adding data-interval="false"

<div id="carousel-example-generic" class="carousel slide" data-interval="false" data-ride="carousel" data-pause="hover" >

From the documentation

Option – Interval – ..If false, carousel will not automatically cycle.

2021 Update

In Bootstrap 5 it is data-bs-interval="false"

<div id="carousel-example-generic" class="carousel slide" data-bs-interval="false" data-ride="carousel" data-pause="hover">

Documentation