וְאָנֹכִ֗י הַסְתֵּ֨ר אַסְתִּ֤יר פָּנַי֙ בַּיּ֣וֹם הַה֔וּא עַ֥ל כָּל־הָרָעָ֖ה אֲשֶׁ֣ר עָשָׂ֑ה כִּ֣י פָנָ֔ה אֶל־אֱלֹהִ֖ים אֲחֵרִֽים׃
Mais alors même, je persisterai, moi, à dérober ma face, à cause du grave méfait qu’il aura commis en se tournant vers des dieux étrangers.
Rashi
[17] And I will wait for the Lord, Who hides His countenance... There is no harsher prophecy than that time when Moses said (Deut. 31:18): “And I will surely hide My countenance on that day.” And even on that very day, He promised them, “And this song shall testify before him as a witness, for it shall not be forgotten from the mouth of his seed” (ibid.).
Or HaChaim
וירא אלוקים…וידע אלוקים. G'd saw,….and G'd knew. After the children of Israel had raised their voices in groanings and prayers and G'd had heard those, He remembered His covenant with the patriarchs. This was the reason He turned His attention to the people. Whenever G'd is described as viewing someone's pain this is sufficient to result in the removal of such pain from the person so afflicted, for His mercy extends to all His creatures. It follows that when G'd is angry He must hide His face from the people otherwise He would have to act in accordance with the principle we have just described. This is why G'd said in Deut. 31,18: "As far as I am concerned, I will surely have to hide My face, etc." The word וידע may refer also to information that had thus far been hidden even from the Israelites concerning evil the Egyptians had perpetrated against that people.
Rashi
until a time, two times, and half a time This is an obscure end, as was said to Daniel (12:4): “And you, Daniel, close up the words and seal,” and the early commentators expounded on it, each one according to his view, and the ends have passed. We can still interpret it as I saw written in the name of Rav Saadia Gaon, that they are the 1,335 years stated at the end of the Book (12:12): “Fortunate is he who waits [and reaches the days one thousand three hundred and thirty-five],” and he explains the appointed time as until the time of two times and a half time, and he [Rav Saadia Gaon] said that the times are 480 [years], which is the time from the Exodus from Egypt until the Temple was built, and 410 [years], [which are] the days of the First Temple, totaling 890, and another half of this time, 445, totaling 1,335. Figure these from the time the daily sacrifice was discontinued until the daily sacrifice will be restored to its place; it was discontinued six years prior to the destruction, and there is somewhat of a proof in this Book. [See Rashi to 8:14.] Others bring further proof to this computation, namely that (Deut. 31:18): “And I, will hide My face” [the words] הַסְתֵּר אַסְתִּיר add up in gematria to 1,335.