Б124
СЧАСТЛИВ ТВОЙ (его, её, ваш, их) БОГ
old-fash (sent
these forms onlyfixed WO s.o. is lucky (that he made the decision he did, that he acted as he did, that things turned out the way they did etc): счастлив твой (его и т. п.) бог = (you should) thank your (he should thank his etc) lucky stars
you (he
etc ) must have been born under a lucky starlucky for you (for her
etc)