Matthew 4:16

4:16 the people who sit in darkness have seen a great light,

and on those who sit in the region and shadow of death a light has dawned.” ¹ 

Matthew 10:27

10:27 What I say to you in the dark, tell in the light, and what is whispered in your ear, ²  proclaim from the housetops. ³ 

[4:16]  ¹ sn A quotation from Isa 9:1.

[10:27]  ² tn Grk “what you hear in the ear,” an idiom.

[10:27]  ³ tn The expression “proclaim from the housetops” is an idiom for proclaiming something publicly (L&N 7.51). Roofs of many first century Jewish houses in Judea and Galilee were flat and had access either from outside or from within the house. Something shouted from atop a house would be heard by everyone in the street below.