Rashi on Numbers 7:19/רש"י על במדבר ז׳:י״ט

1קערת כסף — The numerical value of its letters (of the letters of these two words) is 930 corresponding to the years of Adam ha-Rishon (Numbers Rabbah 14:12).

2שלשים ומאה משקלה THE WEIGHT THEREOF WAS AN HUNDRED AND THIRTY SHEKELS — in allusion to the fact that when he (Adam) first raised children to maintain the world in existence he was 130 years old, for it is said, (Genesis 5:3) “and Adam lived a hundred and thirty years and then begat [a son]” (Numbers Rabbah 14:12).

3מזרק אחד כסף — The numerical value of these words is 520, being an allusion to Noah who begot children at the age of 500 and also an allusion to the twenty years before his offspring were born when the decree regarding the flood was made (thus together 520 years) — just as I have set forth in my comment upon the verse (Genesis 6:3): “yet his days shall be 120 years”. — It is for this reason that it is here said, מזרק אחד כסף and it is not said, מזרק כסף אחד, the number being placed at the end of the phrase, as it is said of the charger (קערת כסף אחת), — to indicate that the letters of the word אחד, too, should be taken into account in this reckoning (Numbers Rabbah 14:12).

4שבעים שקל SEVENTY SHEKELS — corresponding to the seventy nations that descended from his (Noah’s) sons (Numbers Rabbah 14:12).