@activelylearn/material-ui/packages/material-ui-icons/src/Comment.js

Material-UI's workspace package

import React from 'react';
import createSvgIcon from './utils/createSvgIcon';

export default createSvgIcon(
  <g><path d="M21.99 4c0-1.1-.89-2-1.99-2H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h14l4 4-.01-18zM18 14H6v-2h12v2zm0-3H6V9h12v2zm0-3H6V6h12v2z" /></g>
, 'Comment');