Musannaf Ibn Abi Shaybah 6733 — Those who said: pray standing in it

Mughirah said: "I asked Ibrahim about prayer in a ship, and he said: 'If he is able to pray outside the ship, he should pray outside; otherwise he should pray standing in the ship. If he cannot pray standing, he should pray sitting. And whenever the ship turns away from the qiblah, he should turn his direction as well.'"