1 Wakorintho 15 : 2 1st Corinthians chapter 15 verse 2

na kwa hiyo mnaokolewa; ikiwa mnayashika sana maneno niliyowahubiri isipokuwa mliamini bure.
soma Mlango wa 15

by which also you are saved, if you hold firmly the word which I preached to you--unless you believed in vain.