Were - ashamed - Eight MSS. (one ancient) of Kennicott's, and ten of De Rossi's, read הביש hobish, without א aleph . So the Chaldee and Vulgate.
But a shame "But proved even a shame" - Four MSS. (three ancient) after כי ki, add אם im, unless, which seems wanted to complete the phrase in its usual form.
They were all ashamed - That is, all the legates or ambassadors. When they came into Egypt, they found them either unwilling to enter into an alliance, or unable to render them any aid, and they were ashamed that they had sought their assistance rather than depend on God (compare Jeremiah 2:36).