הֲכָזֶ֗ה יִֽהְיֶה֙ צ֣וֹם אֶבְחָרֵ֔הוּ י֛וֹם עַנּ֥וֹת אָדָ֖ם נַפְשׁ֑וֹ הֲלָכֹ֨ף כְּאַגְמֹ֜ן רֹאשׁ֗וֹ וְשַׂ֤ק וָאֵ֙פֶר֙ יַצִּ֔יעַ הֲלָזֶה֙ תִּקְרָא־צ֔וֹם וְי֥וֹם רָצ֖וֹן לַיהוָֽה׃
這豈是我所揀選的禁食，人刻苦己心的日子就是這樣嗎？難道是要他把頭彎下如魚鉤，用麻布和爐灰鋪在身下嗎？你竟稱這為禁食，為永恆者所悅納的日子嗎？
Rashi
Is it to bend Heb. הֲלָכֹף. This ‘hey’ is the interrogative. That is to say, “Perhaps I require bending the head like a fishhook (כְּאַגְמֹן)?” אַגְמֹן is a sort of bent needle with which they catch fish, and they call it ajjm in O.F.
Ibn Ezra
A day for a man to afflict his soul. Repetition of the same idea (a fast) in other words.
Rashi
Will you call this a fast Heb. הֲלָזֶה. An interrogative form. Therefore, the ‘hey’ is punctuated with a ‘hataf-pattah.’