Spoke 16 Nehemiah, Zechariah, 1 Peter
Peter, an apostle of Jesus Christ, to the strangers scattered throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia, Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied. 1 Peter 1:1ff (Spoke 16, Cycle 3)

The theme of scattering that dominates Spoke 16 originated in the Babylonian Exile that coherently subdivides the two groups of Twelve Books (Old Testament History and Minor Prophets) on the first two Cycles. This division extends to the third Cycle, separating the three Epistles to the Scattered (see A Triplet of Triplets, BW book pg 99). Nehemiah specifically addressed this issue in his opening prayer which has many elements in common with the opening vision of Zechariah. For example, both speak of the sins of the fathers who did not keep the Lord's commandments and statutes as given by His servants the prophets (Moses) and call for a return unto the Lord. There also are links to other themes that were discussed on other Spoke 16 articles (linked):

Spoke 16 KeyLink God's Call to Turn from the Sins of the Fathers after the Babylonian Exile
Nehemiah 1:6ff (Spoke 16, Cycle 1)	Zechariah 1:1ff (Spoke 16, Cycle 2)
Let thine ear now be attentive, and thine eyes open, that thou mayest hear the prayer of thy servant [eved], which I pray before thee now, day and night, for the children of Israel thy servants, and confess the sins of the children of Israel, which we have sinned against thee: both I and my father's house have sinned. We have dealt very corruptly against thee, and have not kept the commandments, nor the statutes, nor the judgments, which thou commandedst thy servant Moses. Remember [BW book pg 298], I beseech thee, the word that thou commandedst thy servant Moses, saying, If ye transgress, I will scatter you abroad among the nations: But if ye turn unto me, and keep my commandments, and do them; though there were of you cast out unto the uttermost part of the heaven, yet will I gather them from thence, and will bring them unto the place that I have chosen to set my name there.	In the eighth month, in the second year of Darius, came the word of the LORD unto Zechariah, the son of Berechiah, the son of Iddo the prophet, saying, The LORD hath been sore displeased with your fathers. Therefore say thou unto them, Thus saith the LORD of hosts; Turn ye unto me, saith the LORD of hosts, and I will turn unto you, saith the LORD of hosts. Be ye not as your fathers, unto whom the former prophets have cried, saying, Thus saith the LORD of hosts; Turn ye now from your evil ways, and from your evil doings: but they did not hear, nor hearken unto me [pg 296], saith the LORD. Your fathers, where are they? and the prophets, do they live for ever? But my words and my statutes, which I commanded my servants the prophets, did they not take hold of your fathers? and they returned and said, Like as the LORD of hosts thought to do unto us, according to our ways, and according to our doings, so hath he dealt with us.

Zechariah's explicit reference to scattering comes slightly later in his first chapter (Zech 1:18f):

Then lifted I up mine eyes, and saw, and behold four horns. ... They are the horns which have scattered Judah, Israel, and Jerusalem.