You are delighted with his taste ذُقْهُ تَغْتَبِطْ‏.‏

Its origin is that a group of people were drinking, and among them was a man who did not drink, so they became happy while he was sleeping, so this saying was said to him: That is, taste until you feel happy, as we were happy.
He will be punished for someone who has been deprived for his delay in striving
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This proverb originates from the saying, "Taste it and you'll be delighted," meaning, "Try it and you'll get what we got." It then came to be used to describe someone who is deprived of good or benefit due to their inaction or lack of initiative.
Some of the closest English equivalents are:
"You can't win if you don't play."
"Nothing ventured, nothing gained."
This proverb is very close in meaning.
"He who hesitates is lost."
"You miss 100% of the shots you don't take."
"If you want the fruit, you must climb the tree."
"If you want the fruit, you must make the effort."
The closest equivalent to the Arabic proverb in its implication of loss due to inaction is:
“Nothing ventured, nothing gained.”
“There is no gain for one who neither strives nor tries.”
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أصله أن قوما كانوا على شَرَاب وفيهم رجل لا يشرب، فطربوا وهو مُسْبِت، فقيل له هذا القول‏:‏ أي ذُقْ حتى تَطْرَبَ كما طربنا‏.‏
يضرب لمن حُرِم لتَوَانيه في السعي