{Be ye angry and sin not} (orgizesthe kai m(8820)hamartanete).
Permissive imperative, not a command to be angry. Prohibition
against sinning as the peril in anger. Quotation from  Ps 4:4 .
{Let not the sun go down upon your wrath} (ho h(886c)ios m(8820)epiduet(930a)epi parorgism(9369)). Danger in settled mood of anger. Parorgismos
(provocation), from parorgiz(935c), to exasperate to anger, occurs
only in LXX and here in N.T.