It is commonly said; people in general say; a common saying is.
They say the number 13 is unlucky.
They said the house was haunted.
Used other than figuratively or idiomatically: see they, say.
Source: en.wiktionary.orgWhen people begin to praise us, let us hurry to remember the multitude of ours transgressions, and we will see that we are truly unworthy of that which they say and do in our honor. John Climacus
They say it is better to be poor and happy than rich and miserable, but how about a compromise like moderately rich and just moody? Diana, Princess of Wales
They say all lovers swear more performance than they are able, and yet reserve an ability that they never perform. William Shakespeare
Listen to what they say about others, and you will know what they say about you. Cuban Proverb
If they say you are good, ask you self if it be true. Spanish Proverb
A poor man does not pick up things if does they say he stole them. Swahili Proverb