Reference: Closet
Easton
as used in the New Testament, signifies properly a storehouse (Lu 12:24), and hence a place of privacy and retirement (Mt 6:6; Lu 12:3).
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But you, when you pray, enter into your inner chamber, and having shut your door, pray to your Father who is in secret, and your Father who sees in secret will reward you.
Therefore whatever you have said in the darkness will be heard in the light. What you have spoken in the ear in the inner chambers will be proclaimed on the housetops.
Consider the ravens: they do not sow, they do not reap, they have no warehouse or barn, and God feeds them. How much more valuable are you than birds.
Hastings
The Gr. word so rendered in NT properly denotes 'a store-chamber' as Lu 12:24 RV, then any inner or more private room as opposed to the living-room; so Mt 6:6; Lu 12:3 RV 'inner-chamber.' Cf. 1Ki 20:30; 22:25, lit. 'a chamber within a chamber,' and House,
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But the rest fled to Aphek, into the city; and the wall fell on twenty-seven thousand men who were left. Ben Hadad fled, and came into the city, into an inner room.
Micaiah said, "Behold, you will see on that day, when you go into an inner room to hide yourself."
Gather the people. Sanctify the assembly. Assemble the elders. Gather the children, and those who suck the breasts. Let the bridegroom go forth from his room, and the bride out of her chamber.
But you, when you pray, enter into your inner chamber, and having shut your door, pray to your Father who is in secret, and your Father who sees in secret will reward you.
Therefore whatever you have said in the darkness will be heard in the light. What you have spoken in the ear in the inner chambers will be proclaimed on the housetops.
Consider the ravens: they do not sow, they do not reap, they have no warehouse or barn, and God feeds them. How much more valuable are you than birds.