Greek proverb: εἰς Δῆλον πλέων

Here's a saying from Apostolius, C1.35, with a Latin version from Clavis Homerica. The image is from Wikipedia. Here are some more Apostolius proverbs.

Ἄιδεις ὥσπερ εἰς Δῆλον πλέων.
Canis tamquam Delum navigans.
You sing as if you were sailing to Delos.

Since the voyage from Athens to Delos was an easy voyage, singing would be appropriate; passengers aboard ship might also be singing songs already in praise of the gods Apollo and Artemis.