Adam Clarke on Jeremiah 31:38

The city shall be built to the Lord - This cannot mean the city built after the return from Babylon, for two reasons:

1. This is to be much greater in extent;

2. It is to be permanent, never to be thrown down, Jer 31:40. It must therefore mean, if taken literally at all, the city that is to be built by them when they are brought in with the fullness of the Gentiles.

The tower of Hananeel - This stood in the northeast part of the city; from thence the wall proceeded to the corner gate, (probably the same as the old gate), thus named from its running out into an angle in that part.