Noah was called a righteous man (Gen 6:9) and the dimensions of the ark suggest that he found refuge or dwelled in God’s name…
In Genesis 6:15, God tells Noah to construct an ark that is 300 cubits long, 50 cubits wide, and 30 cubits high. Doing the math, some teachers note that 50 = 10 (yod) X 5 (heh) = YH and 30 = 6 (vav) X 5 (heh) = VH. The width and height can then be said to represent the two parts of God’s four-letter name — YHVH.
Proverbs 18:10 says “the righteous goes to find refuge in YHVH”:
מִגְדַּל-עֹז, שֵׁם יְהוָה; בּוֹ-יָרוּץ צַדִּיק וְנִשְׂגָּב.
The name of YHVH a strong tower:
the righteous runneth into it, and is set up on high.
— Old JPS, via mechon-mamre
This idea appears in a number of contemporary sermons, and I am looking for its source(s).
As part of NaBloPoMo (National Blog Posting Month), a cousin of NaNoWriMo (National Novel Writing Month), “A Song Every Day” plans thirty daily posts with some connection to the number 30.
"A Song Every Day" 