גֵּוִי֙ נָתַ֣תִּי לְמַכִּ֔ים וּלְחָיַ֖י לְמֹֽרְטִ֑ים פָּנַי֙ לֹ֣א הִסְתַּ֔רְתִּי מִכְּלִמּ֖וֹת וָרֹֽק׃
Я отдал спину смитерам, и чеки тем, кто сорвал волосы; Я не скрывал свое лицо от стыда и плевки.
Rashi
I gave my back to smiters He said to me, Isaiah, My children are obstinate; My children are bothersome. [You may go] on the condition that you do not become angry with them. I said to Him, On that condition.
Ibn Ezra
I gave my back, etc. I did not care that I had to expose my back to strokes for the sake of His name.
Tze'enah Ure'enah
“I offered my back to the floggers, etc.” [50:6]. The prophet said: I am always prepared to go, even when I knew well that they wanted to beat me on my back. I exposed my back and allowed whoever wanted to beat. I also exposed my cheeks and beard. Let whoever wants to, tear out my beard. I have not hidden my face and have not hidden myself from being shamed. Rather, I have gone and followed the word of God to reprove the people.