Following are a number of back-translations as well as a sample translation for translators of 1 Samuel 15:23:

• Kupsabiny: “If someone deviates from God, it is like doing witchcraft. And when a person becomes rude, it’s like when he kneels down before other gods/idols. So, Saul, God has refused you. You will no longer be king because you refused to follow what he says.’” (Source: Kupsabiny Back Translation)
• Newari: “To disobey to His commands
  is like doing the sin
  of incantation and chanting,
  and to be pretentious
  is as bad as to worship idols.
  You have broken the word of the LORD, so the LORD has also removed you from the king’s throne."” (Source: Newari Back Translation)
• Hiligaynon: “To-rebel-against the LORD (is) just as- evil -as sorcery; and being-hard of head (is) just as- evil -as worshipping little-gods. Because you (sing.) rejected the command of the LORD, he has-rejected you (sing.) as king.’” (Source: Hiligaynon Back Translation)
• English: “To rebel against God is as sinful as doing sorcery/black magic,
  and being stubborn is as sinful as worshiping idols.
  So, because you disobeyed what Yahweh told you to do,
  he has declared that you will no longer be king.’” (Source: Translation for Translators)