"Just out of curiosity, what is the Biblical basis for Lent?"
It's the past tense of Luke 11:15. I lent three loaves of bread to my friend and remembered too late that there was no bread left in the house so I went without until my next paycheck which was about a month later. It's a little known gloss on the passage which came through some obscure Councils in the middle ages to become an urban legend.
Luke 11:15 is about Jesus being accused of casting out demons by the power of Beelzebul.
You must have meant a different passage.