The table below presents an aligned extract of verses or verselets in Lv18-21 Both verses/verselets discuss the prohibitions of using children for the Molech idolatry. The alignment justifies the Rashi comment that: There are two prohibitions. Children should not be used: a) to give to the Molech idolatry priests b) to pass through the Molech idolatry fires.

Verse	Text of Verse	Rashi comment
Lv13-21	From your children: Do not give [to the Molech priests] Do not [to] pass through to the Molech [fires]	There are two prohibitions. Children should not be used: a) to give to the Molech idolatry priests b) to pass through the Molech idolatry fires.
Lv18-21	From your children: Do not give [to the Molech priests] Do not [to] pass through to the Molech [fires]

Advanced Rashi: Several supplemental points support todays Rashi explanation.
• In rule #1, references we have provided additional verses complementing the information presented at verse Lv18-21. These additional verses show that Molech involved a passing of children between two viscious fires.
• In presenting the above verses we have used the technique of ellipsis. The actual verselet states From your children: Do not give in order to pass through to the Molech. Ellipsis requires that certain parts of the sentence are elliptically transferred to each of the sentence halves. So the actual verse halves read as follows:
  • (#1) From your children: Do not give to the Molech;
  • (#2) From your children: Do not pass through to the Molech.
  In other words it is as if the verse said From your children: Do not give to the Molech and do not pass through to the Molech. When the Bible is faced with such a sentence it will frequently combine both sentence halves by removing repetition and using ellipsis: From your children: Do not give in order to pass through to the Molech.