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 Nu29-39b URL Reference: (c) http://www.Rashiyomi.com/w34n2.htm; Brief Summary: OFFER VOWS ON FESTIVALS (Nu29-39) cross-references the commandment to FULFILL ONES VOWS (Dt23-22:24)

Verse Nu24-39b, discussing the obligation to fulfill ones vows on festivals states These things you shall do to the Lord in your set feasts, beside your vows, and your freewill offerings, for your burnt offerings, and for your meal offerings, and for your drink offerings, and for your peace offerings. Rashi clarifies the underlined words vows by referencing verse(s) Dt23-22:24, discussing the Biblical commandment to keep ones vows (and not delay them) which states When you shall vow a vow to the Lord your God, you shall not be slack to pay it; for the Lord your God will surely require it of you; and it would be sin in you. But if you shall forbear to vow, it shall be no sin in you. That which is gone out of your lips you shall keep and perform; even a freewill offering, according to what you have vowed to the Lord your God, which you have promised with your mouth. Hence the Rashi comment: ...the vows he made during the year should be fulfilled on the festival; otherwise he will be far away, unable to fulfill them, and violate the prohibition against delaying vows.

Text of Target verse Nu24-39b	Text of Reference Verse Dt23-22:24
These things you shall do to the Lord in your set feasts, beside your vows, and your freewill offerings, for your burnt offerings, and for your meal offerings, and for your drink offerings, and for your peace offerings.	When you shall vow a vow to the Lord your God, you shall not be slack to pay it; for the Lord your God will surely require it of you; and it would be sin in you. But if you shall forbear to vow, it shall be no sin in you. That which is gone out of your lips you shall keep and perform; even a freewill offering, according to what you have vowed to the Lord your God, which you have promised with your mouth.
Rashi comments: ...the vows he made during the year should be fulfilled on the festival; otherwise he will be far away, unable to fulfill them, and violate the prohibition against delaying vows.