Al-'Ankabut 29:65

Fa-itha rakiboo fee alfulki daAAawooAllaha mukhliseena lahu addeena falammanajjahum ila albarri itha hum yushrikoon

And when they board a ship, they supplicate Allāh, sincere to Him in religion [i.e., faith and hope]. But when He delivers them to the land, at once they associate others with Him

So when they embark on a ship, they invoke Allah, having their faith purely in Him. But when He saves them (and brings them) to the land, in no time they start committing shirk (ascribing partners to Allah),