Proverb meaning that waking up early brings even a small benefit (三文 = a tiny amount of money). Used to encourage rising early.
They say the early bird gets the worm, so let's get up early tomorrow.
Standard kanji spelling using 徳 (virtue/benefit).
Variant using 得 (gain/profit); both spellings are seen.
A traditional Japanese proverb. 三文 (sanmon) refers to a very small amount of money, suggesting that even a modest gain is worth the effort of rising early.