Laraval 5.1 HasMany Relationship Issue

I have 3 tables posts, comments and likes. One post can have multiple comments and one comments can have multiple likes. How can I define relationship between 3 tables to fetch all posts details, including comments and likes of particular post_id in laravel 5.1?

Tables in DB

1. posts

   • post_id
   • post_detail

2. comments

   • comment_id
   • post_id
   • comment

3. likes

   • like_id
   • comment_id

via Chebli Mohamed