In the first stanza of "A Bird Came Down the Walk" by Emily Dickinson, the rhyme scheme is ABCB. The first and third lines do not rhyme with each other or with the second and fourth lines. Here’s the stanza for reference:
A Bird, came down the Walk—
He did not know I saw—
He bit an Angleworm in halves
And ate the fellow, raw.
In this stanza, "Walk" (A) does not rhyme with any other line, "saw" (B) rhymes with "raw" (B), and "halves" (C) does not rhyme with any of the others.