The "seven-fifty" in "seven-fifty.net" does not refer to a Bible verse, but if it did these are the ones it could potentially refer to (NNIV):
Numbers 7:50 - one gold dish weighing ten shekels, filled with incense;
1 Kings 7:50 - the pure gold basins, wick trimmers, sprinkling bowls, dishes and censers; and the gold sockets for the doors of the innermost room, the Most Holy Place, and also for the doors of the main hall of the temple.
Nehemiah 7:50 - Reaiah, Rezin, Nekoda,
Luke 7:50 - Jesus said to the woman, “Your faith has saved you; go in peace.”
John 7:50 - Nicodemus, who had gone to Jesus earlier and who was one of their own number, asked,
Acts 7:50 - Has not my hand made all these things?