Lǎorén xīnkǔ le yībèizi, yīnggāi hǎohao yíyǎng-tiānnián.
The old folks have worked hard their whole lives - they deserve to spend their later years in comfort.
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Warm and respectful, used about elders. 天年 means the natural lifespan granted by Heaven, so the phrase implies dying peacefully of old age, not being cut short.
usage
Object of 颐养 is 天年 - the idiom is fixed, don't substitute. Often appears with 安享 in sentences like 安享晚年 / 颐养天年.
