谨身节用（謹身節用）　

◎ 谨身节用 jǐnshēn-jiéyòng

[keep a tight rein on self and cut down on expense] 约束自己节约费用。《孝经·庶人章》:“谨身节用,以养父母,此庶人之孝也。”谨,用如使动词,严格约束