en_tn/deu/32/46.md

He said to them

"Moses said to the people of Israel"

Fix your mind on

AT: “Pay attention to” or “Think about” (See: rc://en/ta/man/translate/figs-idiom)

that I have witnessed to you today

AT: "that I am giving today as a declaration of truth to you"

your children

"your children and descendants"

this is no trivial matter for you

AT: "this is not a matter for you to ignore" or "the law is not just empty words" or "you must pay attention to what the law says" (See: rc://en/ta/man/translate/figs-litotes)

because it is your life

AT: "because you will live if you obey it"