Fifteen in a dream

Biblical meaning from Hearing God's Voice in Dreams by Apostle Nicholas V. Mbanjwa

Also: 15

What it means

The presence, the cherubim, God's standard of holiness; also the Blessing and 'to ascend'.

The cherubim above the mercy seat were 15 feet high; the molten sea (where priests washed) was 15 feet in diameter.

The priestly blessing (the Shema, Numbers 6:22-27) is made of 15 Hebrew words.

The fifteen 'Songs of Ascents' (Psalms 120-134) were sung by worshippers journeying to Jerusalem for festivals.

✦ When it is positive

The presence, the cherubim
God's standard of holiness
The Blessing
To ascend

⚠ When it is a warning

5 multiplied by 3 — 5 standing for the condition of the created (David's 5 stones against Goliath and his 4 brothers, the offspring of giants) and 3 the God-number — together enunciating the fallen, evil, wicked, unholy condition of creation under the fall

Scripture

One cherub was ten cubits high, and so was the other cherub.
1 Kings 6:26 (WEB)

²²The LORD spoke to Moses, saying, ²³“Speak to Aaron and to his sons, saying, ‘This is how you shall bless the children of Israel.’ You shall tell them, ²⁴‘The LORD bless you, and keep you. ²⁵The LORD make his face to shine on you, and be gracious to you.
Numbers 6:22-27 (WEB)

The Nephilim were in the earth in those days, and also after that, when God’s sons came in to men’s daughters and had children with them. Those were the mighty men who were of old, men of renown.
Genesis 6:4 (WEB)