By Charles J. Sharp - Own work, from Sharp Photography, sharpphotography, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=37058897
Tree leaves make up 90% of their diet. Because water is essential to the sable antelope's survival, it travels every two to four days to drink at water sources.
Sources:
(*) https://www.inaturalist.org/taxa/42334-Hippotragus-niger
(*) https://animalia.bio/sable-antelope