en_tn/act/28/20.md

the certain hope of Israel

Possible meanings are 1) the people of Israel confidently expect the Messiah to come or 2) the people of Israel confidently expect God to bring those who have died back to life.

Israel

Here "Israel" stands for the people. Alternate translation: "the people of Israel" or "the Jews" (See: rc://en/ta/man/translate/figs-metonymy)

that I am bound with this chain

Here "bound with this chain" stands for being a prisoner. Alternate translation: "that I am a prisoner" (See: rc://en/ta/man/translate/figs-metonymy)