Khat is part of an ancient ritual.
 It is grown principally by communities in the Horn of Africa and the Arabian peninsula, where khat-chewing has a long history as a social custom dating back thousands of years
"In 1856, English writer Charles Dickens also described the custom of khat chewing in the Horn region and the adjacent Gulf territories, likening it to drinking strong green tea:And one may sleep well if, during the day, too much kat has not been chewed

