it never rains but it pours

Translations
беда не приходит одна
After losing his job, he got sick, proving once again that it never rains but it pours.
После того как он потерял работу, он заболел, что снова доказывает, что беда не приходит одна.
Definitions
This phrase means that when one bad thing happens, it is often followed by a series of other bad things, suggesting that misfortunes or difficulties tend to come all at once rather than spread out over time.