﴿ وَأَشْرِكْهُ فِىٓ أَمْرِى ﴾

“and let him share my task,”

and let him share in my affair namely in the delivery of the Message both verbs ushdud ‘confirm’ and ashrikhu ‘let him share’ are in the imperative and in the apocopated imperfect tense constituting the response to the request of Moses.