In Psalm 49:7, no one can ransom another's soul, underscoring the impossibility of any material exchange for one's own soul.

In Psalm 49:8, the redemption of a soul is too costly for human effort, reinforcing the futility of trying to buy it.

1 Peter 1:18 states we are not redeemed with perishable silver or gold, directly matching Mark's implied answer that such things cannot buy the soul.

1 Peter 1:19 offers the only redemption: Christ's precious blood, contrasting sharply with any human attempt to give something in exchange.

Matthew 16:26 is the parallel account of this same saying, reinforcing the teaching about the impossibility of exchanging the soul.

Job 27:8 asks about the hope of the godless when God requires their soul, paralleling the question of what one gives for their soul at judgment.