Day by day continuing with one mind in the temple, and breaking bread from house to house, they were taking their meals together with gladness and sincerity of heart.
Acts 2:46

Now the multitude of those who believed were of one heart and soul, and not even one of them said that any of his possessions were his own, but it was all theirs in common.
Acts 4:32

Being mutually disposed to one another, not high-minded, but associating with the lowly. Do not come to pass for prudent among yourselves. [Do not be wise in your own estimations.]
Romans 12:16

Now may the God who gives perseverance and encouragement grant you to be of the same mind/mutuality with one another according to Christ Jesus; that with one accord you may with one voice glorify the God and Father of our Lord Jesus Christ.
Romans 15:5-6

For who has known the mind of the Lord, that he should instruct Him? Yet we have the mind of Christ.
I Corinthians 2:16

Fill my joy, that you may be mutually disposed, having mutual love, joined in soul, being unanimously disposed --- nothing being done in accord with faction/rivalry or vainglory, but by humility esteeming one another as better than one's self.
Philippians 2:2-3

The Holy Spirit warns us, and says, “What man is he that desires to live, and would fain see good days? Refrain your tongue from evil, and your lips that they speak no guile. Flee from evil, and do good; seek peace, and ensue it.” The son of peace ought to seek peace and ensue it. He who knows and loves the bond of love, ought to refrain his tongue from the evil of dissension. Among His divine commands and salutary teachings, the Lord, when He was now very near to His passion, added this one, saying, “Peace I leave with you, my peace I give unto you.” He gave this to us as an heritage; He promised all the gifts and rewards of which He spoke through the preservation of peace. If we are fellow-heirs with Christ, let us abide in the peace of Christ; if we are sons of God, we ought to be peacemakers. “Blessed,” says He, “are the peacemakers; for they shall be called the sons of God.” It behoves the sons of God to be peacemakers, gentle in heart, simple in speech, agreeing in affection, faithfully linked to one another in the bonds of unanimity. This unanimity formerly prevailed among the apostles; and thus the new assembly of believers, keeping the Lord's commandments, maintained its love. Divine Scripture proves this, when it says, “But the multitude of them which believed were of one heart and of one soul.” And again: “These all continued with one mind in prayer with the women, and Mary the mother of Jesus, and with His brethren.” And thus they prayed with effectual prayers; thus they were able with confidence to obtain whatever they asked from the Lord's mercy.
Cyprian on Unity 24 & 25

…it is necessary for that man to be on all sides free from blemish, before we give him authority of priesthood, of episcopate, of doctorate, of apostleship, of presidency, and of election. For all these are one and the same thing; nor are they one greater or lesser than another. But they are on an entire level, as our Intercessor Jesus enjoined on His holy elect ones, saying, “But be you not so, but he that is great among you shall be as the least, and the leader as the servant” and so forth. In this wise is authority one, as our Lord enjoins saying, where He promises to give authority to all His apostles.
The Key of Truth 22:36-38