'Stone Cold' Steve Austin -- Tim Tebow Can HAVE My 3:16 If ...

Before there was Tebow 3:16 in the NFL ... there was Austin 3:16 in the WWE ... and now the wrestling legend says he's willing to surrender his iconic numbers to the NFL star, pending one GIANT condition.

TMZ spoke with "Stone Cold" Steve Austin -- who tells us he watched Tebow's Mile High Miracle this weekend and was blown away when he learned Tim threw for exactly 316 yards in the playoff victory.

FYI -- the numbers have a special meaning with Stone Cold, who created the famous faux bible verse back in the '90s to humiliate his enemies -- "Austin 3:16 says I just whooped your ass!!!"

Now, Austin tells us, "Austin 3:16 still rules" ... but adds, "If Tebow can throw for 316 yards again this weekend then hell, he can have the numbers and I'll have no problem with it."

Austin continues, "A guy named John was using it before me ... so if Tebow can do it again, more power to him!"

"I wish him all the luck in the world," Austin says ... adding, "I'm not a Denver fan but Tim's a great role model for kids."