Maybe next time you can carry the Book of Mormon. No; the bible is fine; as long as it's translated correcctly.
"You see some classes of the human family that are black, uncouth, uncomely, disagreeable and low in their habits, wild, and seemingly deprived of nearly all the blessings of the intelligence that is generally bestowed upon mankind.
The first man that committed the odious crime of killing one of his brethren will be cursed the longest of any one of the children of Adam. Cain slew his brother.
Cain might have been killed, and that would have put a termination to that line of human beings. This was not to be, and the Lord put a mark upon him, which is the flat nose and black skin. Trace mankind down to after the flood, and then another curse is pronounced upon the same race--that they should be the 'servant of servants', and they will be, until that curse is removed."
Brigham Young-President and second 'Prophet' of the Mormon Church, 1844-1877- Extract from Journal of Discourses.
Here are two examples from their 'other testament', the Book of Mormon.
2 Nephi 5: 21 'And he had caused the cursing to come upon them, yea, even a sore cursing, because of their iniquity. For behold, they had hardened their hearts against him, that they had become like unto a flint; wherefore, as they were white, and exceedingly fair and delightsome, that they might not be enticing unto my people, the Lord God did cause a skin of blackness to come upon them.'
Alma 3: 6 'And the skins of the Lamanites were dark, according to the mark which was set upon their fathers, which was a curse upon them because of their transgression and their rebellion against their brethren, who consisted of Nephi, Jacob and Joseph, and Sam, who were just and holy men.'