Where is the clink in book all quiet on western front?

You're likely thinking of the "clinking of glasses" in Erich Maria Remarque's "All Quiet on the Western Front." However, there is no specific mention of clinking glasses in the book.

There are several scenes where alcohol is consumed, but the focus is on the grim reality of war and the desperation for escape, not on celebratory drinking.

It's possible you're mixing up details from the book with a movie adaptation or other artistic interpretation. If you can remember the context of the scene you're thinking of, I might be able to give you a more precise answer.