וְאִם־כָּ֣כָה ׀ אַתְּ־עֹ֣שֶׂה לִּ֗י הָרְגֵ֤נִי נָא֙ הָרֹ֔ג אִם־מָצָ֥אתִי חֵ֖ן בְּעֵינֶ֑יךָ וְאַל־אֶרְאֶ֖ה בְּרָעָתִֽי׃ (פ)
И если Ты так поступаешь со мной, убей меня, я молю Тебя из-под контроля, если я обрету благосклонность в глазах Твоих; и не дай мне взглянуть на мою жалость.'
Peri HaAretz
Rashi comments z'l "on account of the family affairs..." And the notion that [Moshe] spoke strongly "Why have You dealt ill with Your servant... If You would deal thus with me, kill me rather, I beg You, and let me see no more of my wretchedness!”
Noam Elimelekh
And Moshe also added in his prayer "and if you deal with me like this ככה kakhah, pray kill me, yes, kill me, if I have found favor in your eyes, so that I do not have to see my ill-fortune!" (Exodus 11:15) since has the same ככה gematria as מה mah, since the essence of a tzadik's prayer is through the name מה mah. And this is "And now, O Israel, what מה mah does Ad-nai your God ask of you [but to hold Ad-nai your God in awe, to walk in all his ways and to love and to serve Ad-nai your God with all your heart and with all your soul] (Deut. 10:12), meaning, that you should come to this level, in which your needs are filled by the name מה mah. And this is "Happy is the people שככה shekakha to whom it is like this" (Ps. 144:15) meaning שככה comes from וחמת המלך שככה vechamat hamelech shachacha "and the anger of the king subsided" (Esther 7:10), and so it means 'Happy is the people that are able to calm down the King through the name מה mah, which is ככה kakhah. And this that Moshe our teacher said "if ככה like this" it really meant that, since You given me the level ככה kakhah, I pray "kill me, yes kill me", since King David PBUH "my heart is broken within me" (Ps. 109:23) - and our rabbis explain that he killed his yetzer hara. And at the outset, isn't the yetzer an angel which is impossible to kill? Rather, the explanation is that David was able to turn it from its art, which is to instigate him, and this is how the tzadik kill the yetzer hara, meaning, turning it away so it stops instigating. And the way of the yetzer hara is that, since a person can't conquer it in some thing that it instigates the person, the person needs to redirect it to something else. For a tzadik, [the yetzer] reproves them at all times, showing how the deeds of the tzadik are actually lacking, and the yetzer's intent in this is that the tzadik will be too ashamed to even pray, and this is what Moshe prayed "kill, yes, kill" since the yetzer is also called הרג horeg kill[er]. Moshe meant: I already killed it, as it became my reprover and shows me all my lackings and my evils in order to make it impossible for me to pray, so please You kill it also, so I won't see what I destroy, and so I will be able to pray with all my heart and soul, and this is "I do not have to see my ill-fortune ברעתי, bera'ati [lit. my evil]".