No argument there, as every Bible I know of contains the words of this Benjamite Pharisee. So sure, it's biblical in the sense that it's contained in the bible. Congratulations on once again being Captain Obvious.
What root would that be?
On the clarity of one New Testament writer:
James says this:
James 1:12-15
Blessed is the man who endures temptation; for, having been proved, he shall receive the crown of life, which He has promised to them that love him.
Let no man, being tempted, say, I am tempted of God. For God cannot be tempted by evil things, and himself tempts no one.
But every one is tempted, drawn away, and enticed by his own lust;
then lust, having conceived, gives birth to sin; but sin fully completed brings forth death.
Pretty clear to me that if God wanted to be responsible for a sinful inclination, He'd set up sin as some sort of inherited condition. Inherited conditions aren't something one can change. Therefore a person has certain traits based on inheritance, like blue eyes instead of brown, black hair instead of blond, skin color etc. But original sin is the doctrine that the sinful inclination is inherited for all humans, which can only be a part of God's design and need for salvation.
....which places ultimate responsibility on God for the sinful inclination inheritance problem. James refutes this. He makes it clear that it has nothing to do with God. So in a sense you are right, except the NT I was referring to is James, and yours is a Pharisee's.