There is no smoke without a fire.

آگ کے بغیر کوئی دھواں نہیں ہے

Fire always emits smoke

fire is a source of pollution in the environment

there is some truth in a rumour

for smoke we have to fire

If someone says there's no smoke without fire

they mean that there are rumours or signs that something is true so it must be at least partly true.

ND23-4-2023