Parashas Acharei Mos · Passuk 18:21
Chabad.org — English translation + Rashi
Torah Temima points to Sanhedrin 64b.
English: One might think either delivering without passing or passing without delivering incurs liability; “do not give to pass” requires both acts.
Both delivery and passing required
Full liability for Molech demands both handing the child over and the ritual passing.