Midrash Tanhuma on the Day the Mishkan was Erected

"The Holy One, Blessed be He, said, 'Also I, when I come to you, I will come loaded with blessings and I will bless you. Where did He hint this to them? At Sinai, as it is stated, 'An altar of earth shall you make for Me... wherever I permit My Name to be mentioned I shall come to you and bless you' (Shemot 20:21).

"And when He came to them He blessed them, as it is stated, 'May Hashem bless you and protect you' (Bemidbar 6:24). When? On the day the Mishkan was erected. 'It came to pass on the day Moshe finished erecting the Mishkan' (Bemidbar 7:1). Do not read 'finished' (כלות), instead read 'bride' (כלה): 'On the day the bride entered the wedding canopy (chuppah)'."

-- Midrash Tanchuma, Naso §26


Once the Mishkan was erected, the Shekhinah dwelt with all Israel. Similarly, when the bride enters underneath the chuppah, the Shekhinah dwells with the couple and bestows blessings upon them.

One Should not THROW a Blessing

"And one should not throw a blessing from his mouth."

ולא יזרוק ברכה מפיו

-- Talmud Bavli, Berachot 47a

"And the kohen shall THROW the blood upon the altar of the Lord at the entrance of the Tent of Meeting." 

-- Leviticus 17:6


==Following shechitah (slaughter), the blood is collected in a service vessel and carried to the altar before the priest may THROW the blood upon the altar.

The statement from the sages is a 'segulah' for amplifying energy on the etheric plane. 

There's always more levels of meaning, but there's a difference between meaning, which must be given in thought, versus function, which means the formula from the Bavli can be used as a tool. Once installed in the brain, it makes one's blessings more energetically powerful. This should be combined with the connection to the avodah of the sacrifice.