How to link to a specific line inside post?

Its exactly the same for any other html page. Just because wordpress doesn’t have a .html doesn’t change anything. You add an id attribute to a span or paragraph for example on the page https://example.com/blog/red/:
<p id="here">bla bla bla</p>
You would link to that section using the url https://example.com/blog/red/#here

I already tried this and it was not working… wordpress post does not en with html..

This is what I did…

Page address for example:
“https://www.wordpressblog.com/2009/03/16/beautiful-woman/”

The phrase that I am targeting inside the article for example is “Getting Married”

I did:

Getting Married

I also tried:
Getting Married

and also:

Getting Married

None of them works…

That might be because there is no element with an id of getting married on the page you are linking to!! Try this link https://instantsolve.net/blog/#content
See also https://en.wikipedia.org/wiki/Fragment_identifier