New Testament

Matthew 7:13

13Enter through the narrow gate because the gate is wide and the way is spacious that leads to destruction, and there are many who enter through it. 14 How narrow is the gate and difficult the way that leads to life, and there are few who find it! 15 “Watch out for false prophets, who come to you in sheep’s clothing but inwardly are voracious wolves. 16 You will recognize them by their fruit. Grapes are not gathered from thorns or figs from thistles, are they? 17 In the same way, every good tree bears good fruit, but the bad tree bears bad fruit. 18 A good tree is not able to bear bad fruit, nor a bad tree to bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 So then, you will recognize them by their fruit.

Date: 70-90 C.E.
* Dates are based on scholarly estimates
Pseudepigrapha

Testament of Abraham 11:3

1 So Michael turned the chariot and brought Abraham to the east, to the first gate of heaven; and Abraham saw two ways, the one narrow and contracted, the other broad and spacious, and there he saw two gates, the one broad on the broad way, and the other narrow on the narrow way. 2 And outside the two gates there he saw a man sitting upon a gilded throne, and the appearance of that man was terrible, as of the Lord. And they saw many souls driven by angels and led in through the broad gate, and other souls, few in number, that were taken by the angels through the narrow gate. And when the wonderful one who sat upon the golden throne saw few entering through the narrow gate, and many entering through the broad one, straightway that wonderful one tore the hairs of his head and the sides of his beard, and threw himself on the ground from his throne, weeping and lamenting. 3 But when he saw many souls entering through the narrow gate, then he arose from the ground and sat upon his throne in great joy, rejoicing and exulting. And Abraham asked the chief-captain, My Lord chief-captain, who is this most marvelous man, adorned with such glory, and sometimes he weeps and laments, and sometimes he rejoices and exults? The incorporeal one said: This is the first-created Adam who is in such glory, and he looks upon the world because all are born from him, and when he sees many souls going through the narrow gate, then he arises and sits upon his throne rejoicing and exulting in joy, because this narrow gate is that of the just, that leads to life, and they that enter through it go into Paradise.

Date: 100 C.E.
* Dates are based on scholarly estimates