 शक्तौह्यद्य युवां कर्तुं कार्यं तस्य चिकीर्षितम्।।कृतार्थो वाऽकृतार्थो वा कृत्यं तव करिष्यति। 
 You are both young and able to do the work he wants. Whether his work is done or not, he will fulfil your task. 