Sisqó had to settle with Ricky Martin for quoting "Living the vida loca", then there's the debacle around Katy Perry's Dark Horse...
Point is songwriters absolutely get litigious over reproducing small portions of their IP.
complex.com/music/majority-sisqo-thong-song-publishing-owned-by-writer-livin-la-vida-loca
huffpost.com/entry/katy-perry-dark-horse-lawsuit-payment_n_5d43d825e4b0acb57fca3ff2
factmag.com/2016/06/25/sampling-hip-hop-copyright/