8:8 He sent forth a dove - Which returned the first time with no good news, but probably wet and dirty; but the second time she brought an olive leaf in her bill, which appeared to be fresh plucked off; a plain indication that now the trees began to appear above water. Note here, that Noah set forth the dove the second time, seven days after the first time, and the third time was after seven days too: and probably the first sending of her out was seven days after the sending forth of the raven. The olive branch is an emblem of peace.

Genesis 8:8 Parallel Commentaries

Nature of Covenanting.
A covenant is a mutual voluntary compact between two parties on given terms or conditions. It may be made between superiors and inferiors, or between equals. The sentiment that a covenant can be made only between parties respectively independent of one another is inconsistent with the testimony of Scripture. Parties to covenants in a great variety of relative circumstances, are there introduced. There, covenant relations among men are represented as obtaining not merely between nation and nation, …
John Cunningham—The Ordinance of Covenanting

That it is Profitable to Communicate Often
The Voice of the Disciple Behold I come unto Thee, O Lord, that I may be blessed through Thy gift, and be made joyful in Thy holy feast which Thou, O God, of Thy goodness hast prepared for the poor.(1) Behold in Thee is all that I can and ought to desire, Thou art my salvation and redemption, my hope and strength, my honour and glory. Therefore rejoice the soul of Thy servant this day, for unto Thee, O Lord Jesus, do I lift up my soul.(2) I long now to receive Thee devoutly and reverently, I desire …
Thomas A Kempis—Imitation of Christ

Covenanting Enforced by the Grant of Covenant Signs and Seals.
To declare emphatically that the people of God are a covenant people, various signs were in sovereignty vouchsafed. The lights in the firmament of heaven were appointed to be for signs, affording direction to the mariner, the husbandman, and others. Miracles wrought on memorable occasions, were constituted signs or tokens of God's universal government. The gracious grant of covenant signs was made in order to proclaim the truth of the existence of God's covenant with his people, to urge the performance …
John Cunningham—The Ordinance of Covenanting