Because he lived in an agricultural society. Many who listened to him followed farming traditions that had remained unchanged for centuries.
(‏ متى ١١ :‏ ​ ٢٨ -‏ ٣٠ ؛‏ مرقس ٤ :‏ ​ ٣ -‏ ٩ ؛‏ لوقا ١٣ :‏ ​ ٦ -‏ ٩‏ )‏ لماذا ؟‏