Mishnah 3 - Chapter 4 - Pirkei Avot

Hu hayah omer. Al tehi vaz lechol adam, ve'al tehi maflig lechol davar, she'ein lecha adam she'ein lo sha'ah ve'ein lecha davar she'ein lo makom.

He used to say: do not despise any man, and do not discriminate against anything, for there is no man that has not his hour, and there is no thing that has not its place.

He was wont to say: Do not underestimate any man, [saying: "How can he hurt me?"] and do not "distance" any thing, [saying: It is unlikely to happen and need not be worried about]. For there is no man who does not have his moment and there is no thing that does not have its place.