Here are 3 Bible verses about extraterrestrials from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Leviticus 18:26 KJV
Ye shall therefore keep my statutes and my judgments, and shall not commit any of these abominations; neither any of your own nation, nor any stranger that sojourneth among you:
2 Samuel 14:14 KJV
For we must needs die, and are as water spilt on the ground, which cannot be gathered up again; neither doth God respect any person: yet doth he devise means, that his banished be not expelled from him.
1 Corinthians 15:40 KJV
There are also celestial bodies, and bodies terrestrial: but the glory of the celestial is one, and the glory of the terrestrial is another.