[Grammar] went going fishing

[Snappy]

I found the following expression.

"he went going fishing for forty days"

Do native speakers of English say, "went going (doing something)"?
Is it okay to say, "I will go going fishing"?

 

[Raymott]

I found the following expression.

"he went going fishing for forty days"

Do native speakers of English say, "went going (doing something)"?
Is it okay to say, "I will go going fishing"?

No, that's wrong. You didn't find that expression written by a native.