Greek
4005. pentekoste -- fiftieth, Pentecost, the second of the three ... ... fiftieth day after
Passover. 4005 (from 4002 , "five") -- properly , referring to
the festival of -- a festival celebrated at the end of the
barley harvest.
... /greek/4005.htm - 7kTorrey's TopicalTextbook
Leviticus 23:6,10And on the fifteenth day of the same month is the feast of unleavened bread to the LORD: seven days you must eat unleavened bread.
Torrey's Topical Textbook—AKJVRuth 1:22
So Naomi returned, and Ruth the Moabitess, her daughter in law, with her, which returned out of the country of Moab: and they came to Bethlehem in the beginning of barley harvest.
Torrey's Topical Textbook—AKJV