After so many tutorials I came to know about a working code which works perfectly for displaying particular label posts in side widget or in the body. However, there are many benefits of this widget, if you want to display different label posts on homepage then it will attract your visitors attention and it will also attract some curiosity towards your blog's design also. Here are the steps to be followed:
Firstly, you should give a specific and unique label to your posts which you want to be shown up on another blog. 
Secondly, Paste and the below code before closing tag of </head>

<style>
/* Recent posts by labels
--------------------------------- */ 
img.label_thumb{
float:left;
margin-right:10px !important;
height:72px; /* Thumbnail height */
width:72px; /* Thumbnail width */
border: 1px solid #fff;
-webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, .4);
-moz-box-shadow: 0 1px 1px rgba(0, 0, 0, .4);
box-shadow: 0 1px 1px rgba(0, 0, 0, .4);
}
#label_with_thumbs { text-align: justify;
font: normal 18px Port Lligat Slab;
float: left;
width: 98%;
min-height: 70px;
margin: 0px 10px 2px 0px;
padding: 0;
}
ul#label_with_thumbs li {
padding:8px 0;
min-height:75px;
margin-bottom:0px;
border-bottom: 1px dotted #999999;
}
#label_with_thumbs li{
list-style: none ;
padding-left:0px !important;
}
#label_with_thumbs a:visited {
    text-decoration: none;
    color: black;}
#label_with_thumbs a:link {
    text-decoration: none;
    color: black;}
#label_with_thumbs a { text-transform: none;}
#label_with_thumbs a:hover { text-decoration: underline;}
#label_with_thumbs strong {padding-left:0px; }</style>
<script type='text/javascript'>
//<![CDATA[
function labelthumbs(json){document.write('<ul id="label_with_thumbs">');for(var i=0;i<numposts;i++){var entry=json.feed.entry[i];var posttitle=entry.title.$t;var posturl;if(i==json.feed.entry.length)break;for(var k=0;k<entry.link.length;k++){if(entry.link[k].rel=='replies'&&entry.link[k].type=='text/html'){var commenttext=entry.link[k].title;var commenturl=entry.link[k].href;}
if(entry.link[k].rel=='alternate'){posturl=entry.link[k].href;break;}}var thumburl;try{thumburl=entry.media$thumbnail.url;}catch(error)
{s=entry.content.$t;a=s.indexOf("<img");b=s.indexOf("src=\"",a);c=s.indexOf("\"",b+5);d=s.substr(b+5,c-b-5);if((a!=-1)&&(b!=-1)&&(c!=-1)&&(d!="")){thumburl=d;}else thumburl='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJpTnH4eN8cl3CTl48gFzwAQixHF2QwUMHTQZDKOYBg8Vw0TMxshMVsLF2PRcb4wL3EoyaIKXTkNjt93e5B7n_JqVizXPmL-1eeH3RsbqoD7WPqwpaGDQ9eXSu52bbB1baNzzr_TuiZO4/s1600/picture_not_available.png';}
var postdate=entry.published.$t;var cdyear=postdate.substring(0,4);var cdmonth=postdate.substring(5,7);var cdday=postdate.substring(8,10);var monthnames=new Array();monthnames[1]="Jan";monthnames[2]="Feb";monthnames[3]="Mar";monthnames[4]="Apr";monthnames[5]="May";monthnames[6]="June";monthnames[7]="July";monthnames[8]="Aug";monthnames[9]="Sept";monthnames[10]="Oct";monthnames[11]="Nov";monthnames[12]="Dec";document.write('<li class="clearfix">');if(showpostthumbnails==true)
document.write('<a href="'+posturl+'" target ="_top"><img class="label_thumb" src="'+thumburl+'"/></a>');document.write('<strong><a href="'+posturl+'" target ="_top">'+posttitle+'</a></strong><br>');if("content"in entry){var postcontent=entry.content.$t;}
else
if("summary"in entry){var postcontent=entry.summary.$t;}
else var postcontent="";var re=/<\S[^>]*>/g;postcontent=postcontent.replace(re,"");if(showpostsummary==true){if(postcontent.length<numchars){document.write('');document.write(postcontent);document.write('');}
else{document.write('');postcontent=postcontent.substring(0,numchars);var quoteEnd=postcontent.lastIndexOf(" ");postcontent=postcontent.substring(0,quoteEnd);document.write(postcontent+'...');document.write('');}}
var towrite='';var flag=0;document.write('<br>');if(showpostdate==true){towrite=towrite+monthnames[parseInt(cdmonth,10)]+'-'+cdday+' - '+cdyear;flag=1;}
if(showcommentnum==true)
{if(flag==1){towrite=towrite+' | ';}
if(commenttext=='1 Comments')commenttext='1 Comment';if(commenttext=='0 Comments')commenttext='No Comments';commenttext='<a href="'+commenturl+'" target ="_top">'+commenttext+'</a>';towrite=towrite+commenttext;flag=1;;}
if(displaymore==true)
{if(flag==1)towrite=towrite+' | ';towrite=towrite+'<a href="'+posturl+'" class="url" target ="_top">More »</a>';flag=1;;}
document.write(towrite);document.write('</li>');if(displayseparator==true)
if(i!=(numposts-1))
document.write('');}document.write('</ul>');}
//]]>
</script>

Step Three:

Add html/javascript widget to blogger where you want to see tags post and add below content
<script type='text/javascript'>var numposts = 5;var showpostthumbnails = true;var displaymore = false;var displayseparator = true;var showcommentnum = false;var showpostdate = false;var showpostsummary = true;var numchars = 200;</script> 
<script type="text/javascript" src="/feeds/posts/default/-/Articles2Read?published&alt=json-in-script&callback=labelthumbs"></script>

Replace The Following With Your Details:

var numposts = 5 - Replace 5 with the number of post you want to show.
Articles2Read - Change it with the label of the posts of the blog.


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