Daniel 1:10

and the commander of the officials said to Daniel, “I am afraid of my lord the king, who has appointed your food and your drink; for why should he see your faces looking more haggard than the youths who are your own age? Then you would make me forfeit my head to the king.”

Proverbs 29:25

The fear of man brings a snare,
But he who trusts in the Lord will be exalted.

Matthew 6:16-18

Whenever you fast, do not put on a gloomy face as the hypocrites do, for they neglect their appearance so that they will be noticed by men when they are fasting. Truly I say to you, they have their reward in full.

John 12:42-43

Nevertheless many even of the rulers believed in Him, but because of the Pharisees they were not confessing Him, for fear that they would be put out of the synagogue;

Treasury of Scripture Knowledge

Summary

And the prince of the eunuchs said unto Daniel, I fear my lord the king, who hath appointed your meat and your drink: for why should he see your faces worse liking than the children which are of your sort? then shall ye make me endanger my head to the king.

Worse liking

Bible References

I fear

Proverbs 29:25
The fear of man brings a snare,
But he who trusts in the Lord will be exalted.
John 12:42
Nevertheless many even of the rulers believed in Him, but because of the Pharisees they were not confessing Him, for fear that they would be put out of the synagogue;

Worse liking

Matthew 6:16
Whenever you fast, do not put on a gloomy face as the hypocrites do, for they neglect their appearance so that they will be noticed by men when they are fasting. Truly I say to you, they have their reward in full.