en_tn_condensed/2sa/17/23.md

Ahithophel saw

"Ahithophel knew" or "Ahithophel realized"

his advice had not been followed

"Absalom had not followed his advice"

saddled his donkey

placed a blanket or small leather seat on the donkey so he could sit on it

set his house in order

"prepared for his death"

So

"And this is how"

was buried

"they buried him"