Instructions apply to desktop and mobile users.
Select thealarm/bellicon in the top right corner of Facebook oropen the Notifications page.
Find the alert that mentions your post and you’ll see who shared it and when.

If it’s not a recent post, you could find it through aFacebook search.
Your post has been shared if you see the text1 share,2 shares, etc.
Selectshare/sharesto see who shared the post and any other information the person included when they shared it.

You’ll notice that the samesharelink is available on the right side of the post.
Click it to see the list of people who have shared the post.
Depending on the person’s privacy prefs, you might not see everyone who has shared the post.

In the upper-right corner of the post, select thethree dotsto find the option to trash the post.
Any reposts or shares will become blank.