Zaburi 12 : 6 Psalms chapter 12 verse 6

Maneno ya Bwana ni maneno safi, Ni fedha iliyojaribiwa kalibuni juu ya nchi; Iliyosafishwa mara saba.
soma Mlango wa 12

The words of Yahweh are flawless words, As silver refined in a clay furnace, purified seven times.