I believe (but l am not sure) that it is biblical:

This site:

[link to kabbalahsecrets.com]

“And so we see further hints by the Torah that the period at the end
of 5778 and start of 2019 is the final transformative shift, when the
veils of illusion will be lifted for all to see. The final process
begin, as prophesied in the Zohar and elsewhere, 70 years earlier with
the birth of the nation of Israel in 1948, just like it was foretold
eons ago with the three first locations within Pi (digits # 246, 703
and 996) for the sequence 2019, which with their kolel add up to 1948.
This is also the year (1948 HC) of the birth of Abraham 3830 years
ago, which mirrors the destruction of the Second Holy Temple in 3830
HC, may the Future Holy Temple be completed swiftly.”

And [link to kabbalahsecrets.com]

And [link to kabbalahsecrets.com]