Malbim: The verse depicts Egypt as a rickety stick that one holds in his hand to scare his colleague, as if he will hit him.

Rashi: The pronunciation hints to one who walks and leans on his staff. Radak ? the Kesiv teaches that you will support them with your hand.

Rashi: Teiratzetz (you will be shattered). Radak ? the root is Ratzatz, like "ha'Kaneh ha'Ratzutz" (Melachim II, 18:21).

Rashi: This refers to Yisrael's shoulders. This is like one who leans on a stick, and it broke. He falls on it, and the sharp protrusions (where it broke) enter his shoulders. Radak (6) - this is like Ravshake said "you relied on this rickety stick, on Egypt, that one leans on it, and it comes in his hand, and punctures it" (Melachim II, 18:21). Not only did it not support - it punctured the hand that was holding it!

Malbim: [When he holds the stick to scare his colleague, it fractures,] and his [own] shoulders are cleaved.

Rashi: Since you will break, they will need to strengthen their loins and stand on them. You are like a man that his friend leans on him. He is weak, and tells his friend 'strengthen your loins, for you cannot rely on me further.' (Radak - when one leans [on a support], he bends. When the support breaks, he stands from (ceases) bending.) Targum Yonasan is like this. Menachem says that this is standing on the feet, like I say.

Rashi citing others: Some say that v'Ha'amadta is like v'Ha'ma'adta (they switch the Ayin and Mem ¹ ). Radak ? this is [slipping,] like "Ma'adu Karsulai" (Tehilim 18:37).

Radak citing Targum Yonasan: In their submissiveness to you, you will be handed over to the strong Melech Bavel, and their security will be lost. In their reliance in you, you will be broken.

Malbim: [When he leans on the stick, it breaks totally, and] his loins stand him up. They support the body when one walks; if he leans on a stick, the weight and balance is in the middle, between the body and the stick. When the stick breaks, if he does not stand on his loins he will fall. The Nimshal is, initially [Yisrael] wanted to scare their enemies via Pharaoh, e.g. when Melech Bavel besieged Yerushalayim and they heard that Pharaoh left Mitzrayim, and he departed. Via this, [Yisrael's] shoulder was cleaved ? they needed to pay a bribe to Pharaoh ? "Yis'u Al Kesef Ayarim Cheilehem", "Lo l'Ezer v'Lo Leho'il Ki l'Voshes?" (Yeshayah 30:6, 5). Afterwards [Yisrael] leaned (relied) on them, and needed to stand on their loins and fight for themselves, and their legs were already weary, and they stumbled.