The Lamentations of Jeremiah 1:10
The adversary has spread out his hand upon all her precious and desirable things: for she has seen the nations enter into her sanctuary [of the temple], when you commanded that they should not even enter into Your congregation [in the outer courts]. [Jer. 51:51; Deut. 23:3].
The Ammonites and Moabites, descendants of Lot and kinsmen of Israel, were forbidden to enter the congregation of the Lord, “even to the tenth generation,” because they refused assistance to the Israelites when they were fleeing from Egypt, and because they hired Balaam to curse Israel [Deut. 23:3, 4].
The Israelites themselves never assembled any closer to the sanctuary of the temple than in the court outside its door.
No Jew, not even David, or Jesus Himself or any of His apostles, ever ventured into the sanctuary or temple proper, except certain Levites to whom such service was assigned.
Two Greek words have customarily been translated “temple” in the New Testament.
One, ‘hieron’ always means the temple enclosure [the porches, courts, chambers etc.]; the other word, ‘naos’, means the sanctuary proper – the Holy Place and the Holy of Holies, into which none but the authorized priests might go, and then only at stated times.
But now, Jeremiah says, the forbidden heathen nations enter the very Holy of Holies [for plunder]!
Nothing more humiliating could happen for a Jew than this.
– Amplified Bible: page 915