Updating Multiline textbox RTF (with Enhanced rich text enabled) in SharePoint 2016

I had to update the multiline textbox with rich text format enabled with JQuery. Below code worked for me. It might help someone else also:

 <script type="text/javascript" src="/jquery-1.9.1.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {

 var defaultText = "Hi";

 $('nobr:contains("Comments")').closest('tr').find('div.ms-rtestate-write').html(defaultText);

//"Comments" is my field title or column name . Replace this with your column name.
});

</script>