Yahya bin Abi Kathir narrates from Sayyiduna Anas (may Allah be pleased with him) that the Companions of the Messenger of Allah (peace and blessings be upon him) (may Allah be pleased with them) stayed in Ramhurmuz for nine months and kept shortening the prayer.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5480