Bible citation

From the Bible, Exodus 12, 8-10

[8] And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it.

[9] Eat not of it raw, nor sodden at all with water, but roast with fire; his head with his legs, and with the purtenance thereof.

[10] And ye shall let nothing of it remain until the morning; and that which remaineth of it until the morning ye shall burn with fire.

(English version)

[8] E mangeranno quella notte le carni arrostite al fuoco, e pane azzimo con lattughe selvatiche.

[9] Non mangerete niente di crudo, nè di cotto nell’acqua, ma solamente arrostito al fuoco: mangerete la testa, e i piedi, e gl’intestini di esso. 

[10] Nulla di esso rimarrà al mattino: se qualche cosa n’avanza, la brugerete col fuoco.

(Italian version)

These verses from the Bible refer to the celebration of Easter in the Israel kingdom. Jewish Easter had been instituted in Egypt to commemorate the freeing of israelites. For Israel that meant a new beginning since, after more than 430 years of servitude under the egyptian domanion, israelites could finally follow their own path that God set for them.
The festivity used to begin on the 14th of the Nisan month (March-April) and continued for seven days. On the tenth day of the month, they had to choose one white coat lamb from the whole flock. On the fouteenth day, they should sacrifice that lamb, eat it, and spread the lamb’s blood on the lintel and the two jambs of each door of all their houses.
That’s the marker of their salvation as, in that night, God would pass through Egypt to inflict the ten plagues to the country, just sparing their houses.