Negative Commandment 119 Leaving Over Meat of the Second Passover Offering until Morning
"They shall leave none of it until the morning"—Numbers 9:12.
It is forbidden to leave over of the meat of the Second Passover Offering until the following morning [the morning of the fifteenth of Iyar. Rather, it must be fully consumed on the night of the Second Passover].
Negative Commandment 118 Leaving Over Meat of the Festival Offering until the Third Morning
"Nor shall any part of the meat which you sacrificed on the first day at evening remain all night until the morning"—Deuteronomy 16:4.
It is forbidden to leave over of the meat of the Festival Offering that is sacrificed on the fourteenth of Nissan [the eve of Passover] until the third morning, i.e., the morning of the sixteenth of Nissan. Rather it must be eaten within the two days allotted for this purpose.
Positive Commandment 53 Pilgrimage to the Holy Temple on the Three Festivals
"Three times a year, all your males shall appear"—Deuteronomy 16:16.
Three times a year [on the festivals of Passover, Shavuot and Sukkot] all men are obligated to go to the Holy Temple, too be "seen" by G‑d. Young boys that have the ability to make their trek on their own should be brought along. Once in the Temple, every man is commanded to bring a Burnt Offering, known as an Olat Re'iyah.
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