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 Ex27-03a URL Reference: (c) http://www.Rashiyomi.com/rule1403.htm Brief Summary: The word FORKS in Ex27-03a cross references 1Sa02-13 THE 3 TOOTHED FORK, which explains the way forks were constructed

Verse Ex27-03a discussing the various Temple Table utensils states And thou shalt make its pots to take away its ashes, and its shovels, and its basins, and its forks, and its fire-pans; all the vessels thereof thou shalt make of brass. Rashi notes that the underlined words, forks references verses 1Sa02-13 discussing the use of 3 toothed-forks to take meat. Hence the Rashi comment Forks are utensils with teeth like prongs that can be used to grab meat and turn it over while roasting, thus accelarating cooking.

Text of Target Verse Ex27-03a	Text of Reference Verse 1Sa02-13:14
And thou shalt make its pots to take away its ashes, and its shovels, and its basins, and its forks, and its fire-pans; all the vessels thereof thou shalt make of brass.	And the priests’ custom with the people was, that, when any man offered sacrifice, the priest’s servant came, while the meat was being cooked, with a fork of three teeth in his hand; And he struck it into the pan, or kettle, or cauldron, or pot; all that the fork brought up the priest took for himself. So they did in Shiloh, to all the Israelites who came there.
Rashi comments: Forks are utensils with teeth like prongs that can be used to grab meat and turn it over while roasting, thus accelarating cooking

Advanced Rashi: Rashi does not cite the verse 1Sa02-13:14, but I believe the explicit description in that verse of forks as being three toothed can account for Rashi's explanation. Such additions to the Rashi commentary enrich our understanding of Rashi.