There is an interesting article online about Sirius. It contains some inaccuracies (and misspellings) but does convey some interesting information about the Sirius star system. They write:
An example of this can be seen in ancient Egypt. The priests would tell the surfs (sic) (men whom worked the land) that the sun was “god.”  Although most priests believed that the physical sun was not actually the “supreme being” itself, but instead was the spirit which flowed through the physical sun. However, there was even another level that the priests didn’t even know about… and that highest level of priests knew that although spiritual energy goes through the sun, the original source of everything comes from the star Sirius. In other words, just like how the sun keeps our physical world alive, Sirius keeps the spiritual world alive. It’s associated with the divine and even considered as the home of humanity’s “great teachers.”

They add this quote:
“This ancient people (Egyptians) knew that once every year the Parent Sun is in line with the Dog Star. Therefore, the Great Pyramid was so constructed that, at this sacred moment, the light of the Dog Star fell upon the square “Stone of God” at the upper end of the Great Gallery, descending upon the head of the high priest, who received the Super Solar Force and sought through his own perfected Solar Body to transmit to other Initiates this added stimulation for the evolution of their Godhood. This then was the purpose of the “`Stone of God,’ whereon in the Ritual, Osiris sits to bestow upon him (the illuminate) the Atf crown or celestial light.” “North and South of that crown is love,” proclaims an Egyptian hymn. “And thus throughout the teaching of Egypt the visible light was but the shadow of the invisible Light; and in the wisdom of the ancient country the measures of Truth were the years of the Most High.” - Marshall Adams, The Book of the Master

Source: Wisdom Square - http://www.wisdom-square.com/sirius-connection-to-human-history.html
Credit for Image at Top of Page: https://ourplnt.com/stars-place-sun/sirius-a-sun-comparison/