Let me give you an example from my previous post.

Quite often their previous post has not been at all a success.

Yes it's free if you buy enough books, per my previous post.

My previous post should have said "there was no answer".

Am I writing for you, the one who has read more than 2,000 of my previous posts over the last five years?

I have read some previous posts but can't find the right answer.

However, it sort of builds up as you can see on my previous post.

More details and a few examples can be found in the previous post.

My previous post was supposed to be a reply to you.

That's the subject of much debate in the comments on the previous post.