en_tn/1ch/23/27.md

For by David's last words the Levites were counted

This can be stated in active form. AT: "For David's last command was for his men to count the Levites" (See: rc://en/ta/man/translate/figs-activepassive)

from twenty years old and upward

"who were 20 years old and older." See how you translated this phrase in 1 Chronicles 23:24. (See: rc://en/ta/man/translate/translate-numbers)