《礼记·月令》
这个月，草木更加茁壮高大，不要毁坏和糟蹋。不要大兴土木，不要征发百姓，不要砍伐大树。
是月也，继长增高，毋有坏堕，毋起土功，毋发大众，毋伐大树。
This month, the vegetation is growing more luxuriant and lush, so do not damage or trample it. Do not undertake major construction projects, do not conscript the common people, and do not cut down large trees.