I reference many, but the main one I use is the SDA Bible Commentary.
https://archive.org/details/SdaBibleCommentary1980/SDA%20Sourcebook%20-%20Bible%20Student%27s%20Source%20Book%20%28SDA%20Bible%20Commentary%2C%20Vol.%209%29%20%28txt%29/
Scroll down to “download options” on the right, and choose PDF. Then choose the book of the bible, etc...)