Miss Maudie loves her flowers and the outdoors, so she's always working in her garden. The Foot Washers believe than anything that's pleasure is a sin. They think that she should be spending her time inside reading her Bible. So when they pass her on their way to court, they shout to her,
"'He that cometh in vanity departeth in darkness!'"
They think that she's going to go to hell, and her flowers would burn right with her.
Once inside, the kids can't find a seat. They see Reverend Sykes and they go up to the balcony and sit with him and the others of the black community for the duration of the trial.