Abu Salih said: I asked Ibn `Umar: If they are four? He replied: Then it does not harm you.
Sunan Abi Dawud Book 43, Hadith 80
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Sunan Abi Dawud Book 43, Hadith 79 Next Hadith → I was sitting with my father and there was also a boy with him. He got up and then returned. So my father mentioned a tradition on the authority of Abu Hurairah from the Prophet (ﷺ) saying: If anyone gets up from where he has been sitting and comes back to it, he has most right to it.

Sunan Abi Dawud Book 43, Hadith 81