A citron has several significant appearances in Judaism – the Four Species (arba minim in Hebrew) includes a citron held with three different branches during the holy days of Sukkot; the Israeli movie Ushpizin brought to light the power of a citron to bless a family with a son.
Favorite for their medicinal value more than the taste: garlic, avocado, ginger.
This is one of the seven species mentioned as evidence of fruitfulness in the promised land.
A land of wheat and barley, vines, figs and pomegranates, a land of olive oil and honey. Deut 8:8