To "open one's eyes" is associated with being able to see. Alternate translation: "Then Yahweh gave Balaam the ability to see the angel of Yahweh" (See: [[rc://en/ta/man/translate/figs-metonymy]])
A sword is drawn from its sheath in order to be ready to use. See how you translated this in [Numbers 22:23](./23.md). Alternate translation: "with his sword ready to attack" (See: [[rc://en/ta/man/translate/figs-explicit]])