Kural - 18

If heaven grow dry, with feast and offering never more,
Will men on earth the heavenly ones adore

Explanation
If the heaven dry up, neither yearly festivals, nor daily worship will be offered in this world, to the celestials.

Tamil Transliteration
Sirappotu Poosanai Sellaadhu Vaanam
Varakkumel Vaanorkkum Eentu.