en_tn/psa/106/026.md

raised his hand

The Israelites often raised their hands when swearing an oath.

scatter their descendants among the nations, and scatter them in foreign lands.

These two phrases have basically the same meaning and are used together for emphasis. AT: "and that he would make their descendants live in foreign lands" (See: rc://en/ta/man/translate/figs-parallelism)

scatter

This means to disperse or spread out something.