2 Peter 1:10

10Thereforeδιὸratherμᾶλλον,brothersἀδελφοί,be diligentσπουδάσατεsureβεβαίανyourὑμῶντὴνcallingκλῆσινandκαὶelectionἐκλογὴνto makeποιεῖσθαι·these thingsταῦταforγὰρpracticingποιοῦντεςneverοὐnotμὴshall you stumbleπταίσητέat any timeποτε·

Therefore, brothers, be diligent, rather, to make your⁺ calling and election sure. For [in] doing these things, never at any time shall you⁺ stumble.