Green’s Dictionary of Slang

(Aus.) a hymn; often in pl. as hers and hims.

1905		Duke Tritton’s Letter n.p.: I go to Roll And Lurch every Sunday, and the Winchcombe Carson reckons I’ve got a bosker Let’s Rejoice, and often gets me to sing Her’s And Him’s on my Pat Malone.
2002		Pete’s Aussie Sl. Home Page 🌐 hers and hims: hymns.