Fabregas has been heavily linked with a move to Barcelona in recent months.
Silva told Sky Sports News, when aksed if the Spaniard should stay at the Emirates: “I think so.”
He went on: “I hope he stays. He is a big person and must ask himself and think very carefully if he has to go or not.
“But of course the final decision (is something) he has to do. In case this situation happens, it will be a big blow for Arsenal.
“But let’s wait and see.”