15 Do not hate hard labor or farm work, which was created by the Most High. 16 Do not enroll in the ranks of sinners; remember that retribution does not delay. 17 Humble yourself to the utmost, for the punishment of the ungodly is fire and worms. 18 Do not exchange a friend for money, or a real brother for the gold of Ophir. 19 Do not dismiss a wise and good wife, for her charm is worth more than gold. Source

2 Ben Azzai said: Be quick in performing a minor commandment as in the case of a major one, and flee from transgression; For one commandment leads to another commandment, and transgression leads to another transgression; For the reward for performing a commandment is another commandment and the reward for committing a transgression is a transgression. 3 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. 4 Rabbi Levitas a man of Yavneh said: be exceeding humble spirit, for the end of man is the worm. Rabbi Yohanan ben Berokah said: whoever profanes the name of heaven in secret, he shall be punished in the open. Unwittingly or wittingly, it is all one in profaning the name. Source