3 sentences

1. 他为了贪财而害人，真是造孽。

   tā wèi​le tān​cái ér hài​rén, zhēn shì zào​niè.

   He harmed people for money; it's truly a sin.

   Source: Dong Chinese Dictionary

2. 这种自私的行为最终会害人害己。

   zhè zhǒng zì​sī de xíng​wéi zuì​zhōng huì hài​rén hài​jǐ.

   This kind of selfish behavior will eventually harm others and oneself.

   Source: Dong Chinese Dictionary

3. 这些害人的传言扰乱了社会秩序。

   zhè​xiē hài​rén de chuán​yán rǎo​luàn le shè​huì zhì​xù.

   These harmful rumors have disrupted social order.

   Source: Dong Chinese Dictionary