According to Songfacts.com Public Enemy decided not to sue Madonna for sampling “Security of the First World” (1988) in her 1990 controversial song and video “Justify My Love”. According to Wikipedia additional controversy surrounded the track as well:
“Justify My Love” was written by Lenny Kravitz, Ingrid Chavez and Madonna. Kravitz wrote the song for Madonna, based on a poem written by friend and Prince protégé Ingrid Chavez. Kravitz added the title hook and chorus. Madonna contributed a few lines. Chavez was not credited for the song and later sued Kravitz in 1992. She received an out-of-court settlement, and gained a co-writing credit.
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