Majma al-Zawaid 2992 — Praying on a ship

Anas bin Sirin narrated: I set out with Sayyiduna Anas bin Malik (may Allah be pleased with him) to a place called Shaqq Sirrin. When we reached the Tigris, the time for the Zuhr prayer came, and he led us in prayer sitting on a mat in the boat, while the boat was carrying us along.
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators are thiqat (trustworthy).