The first words said upon landing on the moon were "Contact light.

The first words said upon landing on the moon were
"Contact light. Okay, engine stop. ACA out of detent.
Modes control both auto, descent engine command override, off.
Engine arm off. 413 is in."
Then from Mission Control: "We copy you down, Eagle."
Eagle: "Houston, Tranquility Base here, the Eagle has landed."
Source: Dave Dooling "L+25: A Quarter Century After the Apollo Landing"
in IEEE Spectrum July 1994, p. 25.
The words from the Eagle were also spoken by Armstrong.