4 sentences

1. 您安心去睡吧。

   nín ān​xīn qù shuì ba.

   Relax and go to sleep.

   Source: OpenSubtitles

2. 看到孩子平安无事，她终于安心了。

   kàn​dào hái​zi píng'ān​wú​shì, tā zhōng​yú ān​xīn le.

   Seeing that the child was safe and sound, she finally felt at ease.

   Source: Dong Chinese Dictionary

3. 他温暖的话语让大家感到非常安心。

   tā wēn​nuǎn de huà​yǔ ràng dà​jiā gǎn​dào fēi​cháng ān​xīn.

   His warm words made everyone feel very much at ease.

   Source: Dong Chinese Dictionary

4. 既然来到了新单位，就安心工作吧。

   jì​rán lái​dào le xīn dān​wèi, jiù ān​xīn gōng​zuò ba.

   Since you have come to a new workplace, just focus on your work with peace of mind.

   Source: Dong Chinese Dictionary