Jamieson, Fausset and Brown on Hebrews 11:10

10. looked for--Greek, "he was expecting"; waiting for with eager expectation (Ro 8:19).

a city--Greek, "the city," already alluded to. Worldly Enoch, son of the murderer Cain, was the first to build his city here: the godly patriarchs waited for their city hereafter (He 11:16; 12:22; 13:14).

foundations--Greek, "the foundations" which the tents had not, nor even men's present cities have.

whose builder and maker--Greek, "designer [Ep 1:4, 11] and master-builder," or executor of the design. The city is worthy of its Framer and Builder (compare He 11:16; He 8:2). Compare Note, see on He 9:12, on "found."