When it rains, it pours

क्षते प्रहाराः निपतन्त्यभीक्ष्णं
धनक्षये वर्धति जाठराग्निः ।
आपत्सु वैराणि समुद्भवन्ति
छिद्रेष्वनर्थाः बहुलीभवन्ति ॥

- पञ्चतन्त्रम्

When wounded, powerful blows hit us every moment.
When suffering from severe economic loss, the hunger increases.
When in times of trouble, enemies crop up.
When the group is divided, difficulties multiply.

When it rains, it pours.
Anything that can go wrong will go wrong.