The man on trial for the murder of little Etan Patz 35 years ago confessed to a prayer group weeks after the boy vanished that he’d abused, strangled and cut up a child’s body, a second church pal testified Friday.

Paito Concepcion, 79, told jurors that Pedro Hernandez, 54, made the sickening admission at a spiritual retreat on a New Jersey farm in the summer of 1979.

“At this moment, Pedro was crying,” recalled Concepcion through a Spanish translator. “He said that he worked in a bodega here in New York, he grabbed a child, he gave him a soda, he took him to the basement and in the basement he said that he abused him . . . he said, ‘I cut him. After I cut him,’ he said, ‘I put him in a plastic bag and I threw him in the garbage.’ ”

When Manhattan prosecutor Joan Illuzzi-Orbon asked Concepcion why he hadn’t called the police, he said they thought the man wasn’t “well” as he circled his index finger around the side of his head.

Etan was 6 when he vanished from a Soho street May 25, 1979, after being allowed to go to the school bus stop on his own for the first time. His body was never recovered.

Another church member on the same retreat told jurors Thursday that Hernandez made a similar admission as they walked alone on the farm. In that instance, the former bodega worker claimed he’d stabbed the child to death with a broomstick.

But Hernandez in a videotaped confession to authorities in 2012, told yet another version. He claimed he’d lured the boy into the bodega with a soda, strangled him, put his body in a box and left it on the street. He denied he’d abused him or cut him up.

His attorneys have maintained that the admission was false and coerced from a man with a history of mental illness and an incredibly low IQ.