manna
/ˈmænə; `mænə/ n[U]
1 (in the Bible) food provided by God for the Israelites during their forty years in the desert （圣经中的）吗哪（以色列人在旷野四十年中神赐的粮食）.
2 (idm 习语) like manna (from `heaven) as an unexpected and beneficial gift 意外的好事; 天赐之物
I needed that money so desperately, it was like manna from heaven when it arrived! 我正急需那笔钱, 所以收到时宛如天赐!