log
in to your blogger account.
Now
find the blog you want to edit if you own more than one blog.
Click
on template
Edit html
Click
Proceed
check on Expand
Widget Templates
Search
for :
<data:post.body/> or <p><data:post.body/></p>
and just before it insert the next code
<b:if cond='data:blog.pageType ==
"item"'>
...
