The word "nice" does not appear in most standard English translations of the Bible. This is because the word "nice" has changed in meaning over time. In the past, "nice" could mean foolish, ignorant, or even wanton. These older meanings are not what we typically associate with the word today.
However, the *concept* of niceness, in terms of kindness, goodness, and pleasantness, is certainly present throughout the Bible, expressed through other words like:
* Kind: Colossians 3:12, "Therefore, as God’s chosen people, holy and dearly loved, clothe yourselves with compassion, kindness, humility, gentleness and patience."
* Good: Romans 12:9, "Love must be sincere. Hate what is evil; cling to what is good."
* Gentle: Galatians 5:22-23, "But the fruit of the Spirit is love, joy, peace, forbearance, kindness, goodness, faithfulness, gentleness and self-control. Against such things there is no law."
* Pleasant: Proverbs 16:24, "Gracious words are a honeycomb, sweet to the soul and healing to the bones."
So, while the specific word "nice" isn't there, the virtues associated with being nice are definitely emphasized.