8 My spirit. It is theologically anachronistic to understand “spirit” here in the NT sense as a reference to the Holy Spirit, the third person of the Trinity; nevertheless during this postexilic period the conceptual groundwork was being laid for the doctrine of the Holy Spirit later revealed in the NT.
9 The of v. 5 reads “with the word which I cut with you when you went out from Egypt and my spirit [which] stands in your midst, do not fear.” proposes emending “with the word” to זֹאת הַבְּרִית (zo’t habbérit, “this is the covenant”) at the beginning of the verse. The proposed emendation makes excellent sense and is expected with the verb כָּרַת (karat, “cut” or “make” a covenant), but it has no textual support. Most English versions (including the present translation) therefore follow the here.

In other versions

according to the covenant that I made with you when you came out of Egypt. My Spirit remains in your midst. Fear not.

‘This is what I covenanted with you when you came out of Egypt. And my Spirit remains among you. Do not fear.’

This is the promise I made to you when you came out of Egypt, and my Spirit is present among you; don’t be afraid.’ ”

My Spirit remains among you, just as I promised when you came out of Egypt. So do not be afraid.’

‘according to the promise that I covenanted with you when you came out of Egypt. My spirit is with you; do not be afraid.’

According to the word that I covenanted with you when ye came out of Egypt,

So my spirit remaineth among you: fear ye not.

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