en_tn/1sa/15/03.md

completely destroy all that they have ... kill both man and woman, child and infant, cattle and sheep, camel and donkey

These two phrases mean the same thing. The second phrase gives specific details about what they are to destroy completely. (See: rc://en/ta/man/translate/figs-parallelism)

Do not spare them

This negative statement emphasizes the completeness of the destruction. (See: rc://en/ta/man/translate/figs-litotes)