MORSEL (βρω̂σις, G1111). Found only in the KJV (Heb 12:16), “For one morsel of meat sold his birthright.” ASV has “mess of meat”; RSV has “single meal.” The Gr. word means literally “for one eating,” i.e. one meal, not “one mouthful.”

International Standard Bible Encyclopedia (1915)

Found only in Heb 12:16 the King James Version, "For one morsel of meat (the Revised Version (British and American) "mess of meat") sold his birthright," literally, "for one eating," i.e. one meal. The Great Bible (Cranmer’s) has "for one mease of meat."