Notable Biblical Sevens

Bear with me, people! I love symbolism, archetype, and story. Ignore this post if you are a person who doesn't like to be confronted with anything but the concrete and neatly packaged. This is the kind of research I do because I find it fascinating. Others may find it obscure or picayune.

The Sevenfold Spirit

Spirit of the Lord
Spirit of Wisdom
Spirit of Understanding
Spirit of Counsel
Spirit of Might
Spirit of Knowledge
Fear of the LORD

Isa 11:1 And there shall come forth a rod out of the stem of Jesse, and a Branch shall grow out of his roots:
Isa 11:2 And the spirit of the LORD shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the LORD;
Isa 11:3 And shall make him of quick understanding in the fear of the LORD: and he shall not judge after the sight of his eyes, neither reprove after the hearing of his ears:
Isa 11:4 But with righteousness shall he judge the poor, and reprove with equity for the meek of the earth: and he shall smite the earth with the rod of his mouth, and with the breath of his lips shall he slay the wicked.
Isa 11:5 And righteousness shall be the girdle of his loins, and faithfulness the girdle of his reins

The Seven Pillars of Wisdom

Prudence
Discretion (Knowledge of witty inventions)
Fear of the Lord
Counsel
Sound
Wisdom
Understanding
Strength (Might, Power)

Pro 8:12 I wisdom dwell with prudence, and find out knowledge of witty inventions.
Pro 8:13 The fear of the LORD is to hate evil: pride, and arrogancy, and the
evil way, and the froward mouth, do I hate.
Pro 8:14 Counsel is mine, and sound wisdom: I am understanding; I have strength.
Pro 9:1 Wisdom hath builded her house, she hath hewn out her seven pillars

The Seven Spirits of God

Rev 1:4 John to the seven churches which are in Asia: Grace be unto you, and peace, from him which is, and which was, and which is to come; and from the seven Spirits which are before his throne
Rev 4:5 And out of the throne proceeded lightnings and thunderings and voices: and
there were seven lamps of fire burning before the throne, which are the seven
Spirits of God.
Rev 5:6 And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth.

Rabbinic Commentary

...on the Feast of First Fruits
"And when you will come into the land that Hashem(sacred name) gave to you as an inheritance, and you will settle upon it, you shall take from the First Fruits of the Land that Hashem has given you, put them in a basket and bring them to the place in which Hashem has chosen His presence to dwell." (Deuteronomy 26:1,2)

Rashi, quoting the Talmud (Menachos 84b), explains the Mitzvoh. "From the First Fruits", but not from every kind of first fruits. The Mitzvoh of Bikkurim(first fruits) is done only with the seven special species which Eretz Yisroel(the land of Israel) is praised by; wheat, barley, grapes, figs, pomegranates, olives and dates.

...on the seven pillars of wisdom
"Wisdom hath built her house, she hath hewn out her seven pillars." (Proverbs 9:1)

The commentators remark that this is an allusion to the seven days of creation, the foundations of the world. Everything in the world came into being during those days. These seven pillars also refer to the seven middos (qualities) which as well are foundations of the world (chesed [absolute kindness], gevurah [might or restraint], tiferes [beauty, harmony and balance], netzach [victory, endurance], hod [splendor, majesty], yesod [foundation], malchus [kingship, sovereignty]), as it is written, "Hashem, Yours is the greatness (ha'gedula meaning chesed), the might (ha'gevurah), the beauty (ha'tiferes), the splendor (ha'netzach) and the majesty (ha'hod)". (1 Chronicles 29:12)

The spiritual work of a Jew in this world is to raise up these middos to their source. For instance, when one is moved to inspiration for chesed, or love of a friend or object, he should transpose that emotion into love for Hashem. When one experiences fear due to a circumstance or incident, he should transpose that fear into awe of the great name of Hashem, and reflect on how He rules the world, and that there is no place void of His presence. When one is struck by the awesome beauty of some object or the raw beauty and symmetry of nature, he should reflect that this beauty is really only an expression of Hashem Himself and that the only true beauty is His.

Bikkurim alludes to this concept in that Bikkurim came only from the first fruits of the seven species. The seven species correspond to the seven middos, which correspond to the seven days of creation and foundation of the world. The Torah(Pentateuch) wants the Bikkurim to come from the first fruits of the seven species of "the land", (artzecha - which refers to the physical and material realm.) Therefore, one takes all of his physical, mundane aspects from each and every middoh, brings them before Hashem, and consecrates them to His service. "Bring the first fruits of your land to Hashem your G-d." (Exodus 23:19)