Bible Dictionaries
Grain

Easton's Bible Dictionary

Used, in Amos 9:9 , of a small stone or kernel; in Matthew 13:31 , of an individual seed of mustard; in John John 15:37 , of wheat. The Hebrews sowed only wheat, barley, and spelt; rye and oats are not mentioned in Scripture.

Bibliography Information
Easton, Matthew George. Entry for 'Grain'. Easton's Bible Dictionary. https://www.studylight.org/​dictionaries/​eng/​ebd/​g/grain.html. 1897.