Where did Ezekiel sit overwhelmed among the exiles for seven days?

Answer: Tel-abib

Ezekiel came to the exiles at Tel-abib by the River Kebar and sat among them, overwhelmed, for seven days before God spoke again.

“I came to the exiles at Tel-abib who dwelt by the River Kebar. And for seven days I sat where they sat and remained there among them, overwhelmed. At the end of seven days the word of the LORD came to me, saying,”— Ezekiel 3:15-16 (BSB)