Komentarz do Izajasza 41:10

be not discouraged Heb. אַל תִּשְׁתָּע. Let your heart not melt like wax (שַׁעֲוָה). This is the rule: Every word whose first radical is ‘shin,’ when it is used in the reflexive present, past, or future, the ‘tav’ separates it and enters between the first two radicals. Comp. (infra 49:16) “And He was astounded (וַיַּשְׁתּוֹמֵם)”; (Micah 6:16) “For the statutes of Omri shall be observed (וְיִשְׁתַּמֵּר)”; (I Sam. 1: 14) “will you be drunk (תִּשְׁתַּכָּרִין)?”; (Job 30:16) “My soul is poured out (תִּשְׁתַּפֵּךְ).”

תשתע The second ת is the characteristic of the Hithpael, correctly put after the first radical. אל תשתע Do not turn away.¹⁹See c. xvii. Note 11; c. xxii. Note 4.¹⁹See c. xvii. Note 11; c. xxii. Note 4. Comp. שעו מני turn away from me. (22:4)