Thirukkural – 672
Delay doing things that need to be delayed;
delay not those that are not to be delayed.
தூங்குக தூங்கிச் செயற்பால தூங்கற்க
தூங்காது செய்யும் வினை.
Nature of some jobs need them to done in gradual fashion. One shouldn’t rush to do them. Some other jobs needs to be done without delay. They should be done at the earliest.
தூங்கு – delay