魚心あれば水心あり うおこころあればみずこころあり if you do a favor for somebody, you will get a return favor; if a fish is friendly toward water, water will be kind to the fish too; you scratch my back and I'll scratch yours exp proverb Advanced ➥
用心するに越したことはない ようじんするにこしたことはない better safe than sorry; one should err on the side of caution exp proverb Advanced ➥