3 sentences

1. 那位老人已经上山入土为安了。

   nà wèi lǎo​rén yǐ​jīng shàng​shān rù​tǔ​wéi'ān le.

   The old man has been laid to rest in the mountains.

   Source: Dong Chinese Dictionary

2. 他用力挥动木槌，将木桩钉入土中。

   tā yòng​lì huī​dòng mù​chuí, jiāng mù​zhuāng dìng rù tǔ zhōng.

   He swung the wooden mallet with force to drive the stake into the ground.

   Source: Dong Chinese Dictionary

3. 入土为安是中国的传统丧葬观念。

   rù​tǔ​wéi'ān shì Zhōng​guó de chuán​tǒng sāng​zàng guān​niàn.

   The idea of 'resting in peace in the earth' is a traditional Chinese burial concept.

   Source: Dong Chinese Dictionary