If you are going to transfer it to your spouse account and keep it for 6 months at least, only proof that has to be provided is letter from your spouse's bank. No additional document required from you or your father regarding source.
Also, just to make you aware, it is not necessary to transfer the amount to your spouse account if you are going to accompany. You can retain it in your account. What CIC says is"
"
If your spouse is coming with you, you can count money you have together in a joint account. You may be able to count money in an account under their name only, but you must prove you have access to the money. "
https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/express-entry/documents/proof-funds.html
So either you can choose to make your spouse a join account holder or provide spouse with a letter declaring that you are providing your spouse with complete access to the funds in your account for Canadian PR purpose. Of course, in that case, you need to obtain the required statements/balance letter from your bank.