If
Jacob is not your brother in the Kingdom of God, be worried of your salvation, as Jacob is in the Kingdom of God.
Luke 13 (ESV)
20 And again he said, "To what shall I compare the kingdom of God?
21 It is like leaven that a woman took and hid in three measures of flour, until it was all leavened."
22 He went on his way through towns and villages, teaching and journeying toward Jerusalem.
23 And someone said to him, "Lord, will those who are saved be few?" And he said to them,
24 "Strive to enter through the narrow door. For many, I tell you, will seek to enter and will not be able.
25 When once the master of the house has risen and shut the door, and you begin to stand outside and to knock at the door, saying, 'Lord, open to us,' then he will answer you, 'I do not know where you come from.'
26 Then you will begin to say, 'We ate and drank in your presence, and you taught in our streets.'
27 But he will say, 'I tell you, I do not know where you come from. Depart from me, all you workers of evil!'
28 In that place there will be weeping and gnashing of teeth, when you see Abraham and Isaac and
Jacob and all the prophets in the kingdom of God but you yourselves cast out.
29 And people will come from east and west, and from north and south, and recline at table in the kingdom of God.
30 And behold, some are last who will be first, and some are first who will be last."
2 Peter 3 (ESV)
15 And count the patience of our Lord as salvation, just as our beloved brother Paul also wrote to you according to the wisdom given him,
16 as he does in all his letters when he speaks in them of these matters. There are some things in them that are hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other Scriptures.
17 You therefore, beloved, knowing this beforehand,
take care that you are not carried away with the error of lawless people and lose your own stability.