Following are a number of back-translations as well as a sample translation for translators of 1 Samuel 17:50:

• Kupsabiny: “So David managed/overpowered Goliath using just a sling and a stone!” (Source: Kupsabiny Back Translation)
• Newari: “In this way David defeated [him] by using his sling and a stone. Even though he did not have a sword, he struck Goliath and killed him.” (Source: Newari Back Translation)
• Hiligaynon: “So David triumphed-over/beat Goliat by-means-of just a sling/something-to-hurl-or-flick and one stone. He killed Goliat even-though he had-no sword.” (Source: Hiligaynon Back Translation)
• English: “Then David ran and stood over Goliath. He pulled Goliath’s sword from its sheath and killed him with it, and then cut off his head. In that way David defeated the Philistine without having his own sword. He used only a sling and a stone!
  When the other Philistines saw that their great warrior was dead, they ran away.” (Source: Translation for Translators)