I use the rich text editor (if you highlight the text in your post and then click the little chain icon, it will allow you to paste the hyperlink and the forum will do the coding for you to insert the hyperlink into your text), but you can also use BBCode when typing out the text in your post.
Code:
[url=https://somelinkhere.com] link text[/url]
I believe the permalink for your specific post can be found on the top right corner of the post in the thread - click the number and the popup should provide you with the permalink. For example, this post is post #731, and the permalink is:
https://forum.purseblog.com/threads...mendation-thread.981642/page-49#post-33539645
For an example of how I would embed that hyperlink into text:
Code:
This is [url=https://forum.purseblog.com/threads/current-good-quality-fair-price-but-little-known-recommendation-thread.981642/page-49#post-33539645]my post[/url] in this thread.