需卦初九
水天需 · 周易第 5 卦
初九：需于郊。利用恒，无咎。
小象传
象曰：需于郊，不犯难行也。利用恒，无咎，未失常也。
爻位
初九是阳爻居初位，阳居阳位为当位；与四爻相应，一阴一阳为有应。
京房纳甲：甲子（水），六亲为妻财，为应爻。
此爻变
此爻独动，水天需变为水风井（第 48 卦）。对应的易林诗：焦氏易林·需之井。
理雅各英译（1882）
The first NINE, undivided, shows its subject waiting in the distant border. It will be well for him constantly to maintain (the purpose thus shown), in which case there will be no error.
'He is waiting in the (distant) border:' - he makes no movement to encounter rashly the difficulties (of the situation). 'It will be advantageous for him constantly to maintain (the purpose thus shown), in which case there will be no error:' - he will not fail to pursue that regular course.
本卦
水天需（第 5 卦），卦辞：需：有孚，光亨，贞吉。利涉大川。
下一爻：九二
经文依通行本，已与 Chinese Text Project（ctext.org）逐段比对。卦象是研读与自我反思的材料，不作吉凶断语，也不替代医疗、法律、财务等专业意见。