Dragon Ball - Vol. 33 Ch. 394 - The Cell Games Begin!

[MangaDex]

 

[daywithoutgames]

page 5 :
goku : yo gohan , stay here and spend your (last) 9 days with dende , your green foreign boy-friend , instead of spending your days with your own mother . my motto is : boy-friends before family , lol .

 

[shehu101]

Seeing that we know that Goten is born not far in the future, we can conclude the real reason Goku told Gohan to stay with Dende at the lookout.

 

[JotaroKuujo12392]

goku probably told gohan to stay with dende because he was gonna smash chi chi

 

[LordTouchMee]

Satan the Legend, the Master the GOD of Destruction is here