en_tn/rom/15/09.md

and for the Gentiles to glorify God for his mercy

This is the second reason for which Christ became a servant of the circumcision. Alternate translation: "and in order that the Gentiles might glorify God for his mercy"

As it is written

You can translate this in an active form. Alternate translation: "as someone has written in the Scriptures" (See: rc://en/ta/man/translate/figs-activepassive)

sing praise to your name

Here "your name" is a metonym that refers to God. Alternate translation: "sing praise to you" (See: rc://en/ta/man/translate/figs-metonymy)