1. RASHI METHOD: REFERENCES BRIEF EXPLANATION: Commentary on a verse is provided thru a cross-reference to another verse. The cross references can either provide (1a) further details, (1b) confirm citations, or (1c) clarify word meaning. This examples applies to Rashis Lv23-39b URL Reference: (c) http://www.Rashiyomi.com/w33n17.htm Brief Summary: Passover is in SPRING; Succoth is in HARVEST season. So leap years are made if necessary

Verse Lv23-39b discussing when to celebrate the holiday of Succoth states Also in the fifteenth day of the seventh month, when you have gathered in the fruit of the land, you shall keep a feast to the Lord seven days; on the first day shall be a sabbath, and on the eighth day shall be a sabbath. Rashi clarifies the underlined words when you have gathered in the fruit of the land by referencing verses Dt16-01 which states Watch for the month of Spring, and keep the Passover to the Lord your God; for in the month of Spring the Lord your God brought you out of Egypt by night. Hence the Rashi comment: The Bible ties Passover to Spring and Succoth to harvest. From this requirement we infer that calendar months must be watched (adding if necessary extra months) so that Passover always falls out in Spring and Succoth at Harvest time.

Text of Target verse Lv23-39b	Text of Reference Verse Dt16-01
Also in the fifteenth day of the seventh month, when you have gathered in the fruit of the land, you shall keep a feast to the Lord seven days; on the first day shall be a sabbath, and on the eighth day shall be a sabbath.	Dt11-10:17 which states Watch for the month of Spring, and keep the Passover to the Lord your God; for in the month of Spring the Lord your God brought you out of Egypt by night.
Rashi comments: The Bible ties Passover to Spring and Succoth to harvest. From this requirement we infer that calendar months must be watched (adding if necessary extra months and making a leap year) so that Passover always falls out in Spring and Succoth at Harvest time.

Advanced Rashi: Rashi literally states From here - Verse Lv23-39b, discussing Succoth and harvest - we learn that calendar months must be adjusted so that Succoth coincides with harvest. Ah! But that is not true! It is not true that we learn this law (adjusting the calendar) from Succoth. In fact we learn the law requirement of adjusting the calendar from the explicit Biblical verse at Dt16-01 Watch [for] the Spring time and make a Passover. It appears to me that this Rashi text is proof that when Rashi say we learn from here this phrase should not be taken literally. It rather should be interpreted as This is one of the possibly many places where we learn from and it is not even the main place. Throughout this email list I have encouraged such reinterpretations of exclusive statements by Rashi. The serious student of Rashi should carefully review the Rashi text and the arguments presented above to convince him/her self of this. For this reason we always feel free to supplement a Rashi statement we learn from here with other derivations. The more skeptical reader is encouraged to read the Rashi on Dt16-01 which proves that Rashi did not learn the calendar law requirement from here. For another application of this fundamental principle in reading Rashi please see below rule #4, alignment.