Gǔrén yòng yí yǎng tiānnián lái miáoshù wǎnnián de ānyì shēnghuó.
Ancients used 颐养天年 to describe a peaceful life in old age.
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history
颐 is a classical character meaning to nourish or nurture. It appears in the idiom 颐养天年 (yí yǎng tiānnián, to enjoy one's remaining years) and in 颐和园 — the Summer Palace — whose name means 'garden for cultivating harmony and good health.'