Here is a portion of what happened.
Buzz Aldrin had with him the Reserved Sacrament. He radioed: “Houston, this is Eagle. This is the LM pilot speaking. I would like to request a few moments of silence. I would like to invite each person listening in, whoever or wherever he may be, to contemplate for a moment the events of the last few hours, and to give thanks in his own individual way.”
Later he wrote: “In the radio blackout, I opened the little plastic packages which contained the bread and the wine. I poured the wine into the chalice our church had given me. In the one-sixth gravity of the moon, the wine slowly curled and gracefully came up the side of the cup. Then I read the Scripture, ‘I am the vine, you are the branches. Whosoever abides in me will bring forth much fruit.’ I had intended to read my communion passage back to earth, but at the last minute Deke Slayton had requested that I not do this. NASA was already embroiled in a legal battle with Madelyn Murray O’Hare, the celebrated opponent of religion, over the Apollo 8 crew reading from Genesis while orbiting the moon at Christmas. I agreed reluctantly…Eagle’s metal body creaked. I ate the tiny Host and swallowed the wine. I gave thanks for the intelligence and spirit that had brought two young pilots to the Sea of Tranquility. It was interesting for me to think: the very first liquid ever poured on the moon, and the very first food eaten there, were the communion elements.”
H/T The Scriptorium Daily