To quickly turn off comments on Facebook post so as to keep your account safe and protected, check out the steps mentioned below:
Move to the desired post on your profile from which you want to restrict the comments.
Tap on the three-dot option from the top right corner of the post.
Click on who can comment on your post.
Now, you can choose one option from the three given as Public, friends, or profiles and pages you mention.
Choose the option, and no one else apart from the selected people can comment on your post.