"children come home on the celtic ray"

My Babies home,with His Baby(due in 14wks), girlfriend and large Husky dog!!I have been praying for Joe and Daisy to come home for 8 months,and he is,i was o.k even when he came in and burst into tears, and i was o.k myself until i started to listen to a Van morrison song called Celtic Ray, some of the lyrics are " the mothers calling for their children,"Children come home, on the celtic Ray",( i have no idea what a celtic ray is, but i shed a few tears!!!