4"Hear, O Israel: The Lord our God, the Lord is one. 5You shall love the Lord your God with all your heart and with all your soul and with all your might (Deut 6:4-5)
The grace of the Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit be with you all (2 Cor 13:14)
4There is one body and one Spirit—just as you were called to the one hope that belongs to your call— 5 one Lord, one faith, one baptism, 6 one God and Father of all, who is over all and through all and in all (Eph 4:4-6)
As numerous scholars have pointed out, 1 Cor 8:6 is a binary reworking of the Shema. By the same token, does that make Eph 4:4-6 is a trinary reworking of the Shema? Paul already brought Jesus into the Shema in 1 Cor 8:6, so is he now extending that framework to the Holy Spirit in Eph 4:4-6? In other words, this seems to be his Trinitarian reformulation of the Shema.
A possible objection to this interpretation is that we have 7 ones rather than 3 ones in Eph 4:4-6 (i.e. Father, Son, Spirit, body, hope, faith, baptism).
i) The 4 ones (body, hope, faith, baptism) take the 3 ones (Father, Son, Spirit) as their devotional object. So it's a 3+4 relation, where the 4 are subordinated to the 3.
ii) Likewise, this, too, could be modeled on Deut 6:4-5, where love, heart, soul, and might take God/Yahweh as their devotional object.
Ephesians uses "one" whereas Deuteronomy uses "all," but both quantifiers are employed to express exclusive devotion to the only true God.