Is this narration reported from Mujahid, concerning Abdullah ibn Umar's going out to greet, authentic, and where can it be found in the books of Hadith?

The mentioned wording has not been found in any narration. However, what Ibn Abi Shaybah transmitted from Ibn Umar states that he said: "Indeed, I leave my family, and I do not leave except to say salam and have salam said to me." This wording, or something close to it, has been reported in other books.