DB Chapter 292
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
"The True Dragon God" (いでよ本場の神龍！！, Ide yo Honba no Shenron!!; Literally meaning "Come Forth, Genuine Shenlong!!") is chapter 292 of the Dragon Ball manga.
Kuririn explains that he was on his way to see the Eldest, since they couldn't make a wish even though they have all the Dragon Balls. Dende says they thought so, so that's why the Eldest sent him to tell them how. If you don't say it in Namek, your wish won't be granted. Dende says they should hurry, as the Eldest's life is almost over, and Freeza is on his way. Back at the spaceship, Gohan thinks it will take Kuririn two hours to get to the Eldest's place and back, as Vegeta naps under the ship. Gohan then feels something coming. It's not Freeza, but two ki. One of the ki disappears, so it must be Kuririn, and the other is Dende. They reach Gohan, and explain that Dende was already on his way with the necessary knowledge to summon Shenlong. Kuririn asks where Vegeta is, and Gohan says he's resting since he hasn't slept since he got here.
Kuririn is glad to hear that, and says they should take this opportunity to move the Dragon Balls and call Shenlong from somewhere he won't notice. The three of them collect all the Dragon Balls and fly a short distance away. Gohan suddenly notices something approaching them at an incredible speed, and Kuririn realizes it's Freeza. Dende begins chanting, "Takkaraputo Popporunga Pupirittoparo", and the Dragon Balls start to glow. The sky turns black, as a huge light starts to shoot up from the Dragon Balls. Freeza stops mid-air and wonders why it's suddenly night, as everyone on Kaiō's planet celebrates that they're finally getting their wish granted.
The dragon has appeared, and he's huge! Kuririn says he's much larger than Earth's dragon, and shaped differently. Gohan wonders if that's Shenlong, and Dende explains that here he's called Porunga, which means "god of dreams". This is also Dende's first time seeing him. "Thou who hast collected all seven Dragon Balls, speak thy wish. I shall grant you any three wishes within my abilities." Kuririn can't believe he said three, and thinks this Shenlong is really something. Dende says to hurry up before Freeza or Vegeta get here. "F-first, please return to life all of the people on Earth killed by the Saiyans!!" Dende repeats it in Namek. "That is a wish that cannot be granted. The number of people I am able to return to life is only one." Kuririn and Gohan can't believe this, as Kaiō relays this to everyone on his planet. Piccolo then asks to be allowed to speak to Gohan.