Genesis 2:24 (c) Our Lord considers that the husband and wife constitute one unit. This is true even after the family enlarges. It is still one family.

Numbers 15:16 (a) Although Israel had many laws, GOD considers all of it as just one law.

Deuteronomy 6:4 (a) This passage may be easily understood when we remember that it refers to the heavenly family of three, or the heavenly firm of the Father, the Son and the Holy Spirit. We refer to a bank as one bank, though many men operate it. We refer to one family though there may be six members in it. The passage does not speak of "one person." It does speak of one Lord. The three Persons of the Trinity operate together. What is done by anyone of the three Persons is agreed to by the others, and is binding on the others. It is one authority, though there are three Persons exercising that authority. These three members of the Godhead are not one Person, but they are one in plan, program, and purpose.

John 10:30 (a) We all know that these two persons are just one person, for we read that the Father sent the Son. In another place, the Father spoke from Heaven concerning His Son on the earth. In another place the Son said "I ascend unto My Father." He was telling us that they are one in purpose, one in plan, and one in action. (See John 17:21).

Acts 28:25 (a) Although Paul said that he spoke "one word," or rather Luke said it in this passage, the writer mentioned a great many words that Paul spoke. He was indicating that there was one message for the people, one story to tell, one explanation given.

Galatians 3:28 (a) The church consists of many persons, yet in GOD's sight it is just one group, one church, one family, one kingdom. It is not necessary to give the many other references in which the number one represents a group, or a bunch, or a collection, or more than one. From the numerical standpoint the number one represents indivisibility. One cannot be divided. One is not subject to separation. One represents a unit.

Bibliography Information
Watson, Walter. Entry for 'One'. Wilson's Dictoinary of Bible Types. https://www.studylight.org/dictionaries/eng/wdt/o/one.html. 1957.

Bible Dictionaries One

Wilson's Dictionary of Bible Types

Bible Dictionaries
One