expression
you can learn from anyone
Proverb from the Analects of Confucius meaning that in any group of people, there is always someone from whom you can learn something.
「三人行けば必ず我が師有り」というように、誰からでも学ぶ姿勢が大切だ。
As the saying goes, 'If three walk together, I'll have a teacher,' it's important to have an attitude of learning from anyone.
From the Analects of Confucius (『論語』). The original Chinese is 「三人行、必有我師焉」.