1 Thessalonians 5:11

Build each other up (oikodomeite ei ton ena). Literally, build ye, one the one (ei nominative in partitive apposition with unexpressed umei subject of oikodomeite. Then ton ena the accusative in partitive apposition with the unexpressed eautou or allhlou. See the same idiom in 1 Corinthians 4:6 one in behalf of the one, ei uper tou eno. Build is a favourite Pauline metaphor.