《睡虎地秦墓竹简·秦律十八种·仓律》
隶臣作农业劳动的，从二月起每月发粮二石半，到九月底停发其中加发的半石。
隸臣田者，以二月月稟二石半石，到九月盡而止其半石。
Officials engaged in agricultural labor receive a monthly grain allowance of two and a half stones from February. Half of this additional grain is suspended from the end of September.