9 This had been their intention all along (41:17). Though they consulted the Lord and promised to do what he told them whether they agreed with it or not (42:5–6), it is clear that they had no intention of doing so. Jeremiah could see that (42:19–22). They refused to believe that the Lord had really said what Jeremiah told them (43:4) and feared reprisal from the Babylonians more than any potential destruction from the Lord (43:3).
10 Tahpanhes was an important fortress city on the northern border of Egypt in the northeastern Nile delta. It is generally equated with the Greek city of Daphne. It has already been mentioned in 2:16 in conjunction with Memphis (the Hebrew name is “Noph”) as a source of soldiers who did violence to the Israelites in the past.

In other versions

And they came into the land of Egypt, for they did not obey the voice of the Lord. And they arrived at Tahpanhes.

So they entered Egypt in disobedience to the Lord and went as far as Tahpanhes.

They went to the land of Egypt because they did not obey the Lord. They went as far as Tahpanhes.

The people refused to obey the voice of the Lord and went to Egypt, going as far as the city of Tahpanhes.

and they came into the land of Egypt, for they did not listen to the voice of Yahweh. And they came up to Tahpanhes.

So they came into the land of Egypt: for they obeyed not the voice of the Lord: thus came they even to Tahpanhes.

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