brakhutátōi d' àn kephalaíōi tôid' àn mḕ proésthai hēmâs máthoite
shortest.N.DAT.SG then IRR heading.N.DAT.SG this.N.DAT.SG IRR not abandon.AOR.INF.MID us.ACC learn.2PL.AOR.OPT
In summary, you should learn from this not to abandon us' (Thucydides 1.36.3)