John 8:5

Now in the law Moses commanded us to stone such: what then sayest thou of her? And this they said trying him, that they might have whereof to accuse him. But Jesus stooped down, and wrote with his finger on the ground.

The Pharisees were misapplying Moses' law here, since "stoning" was commanded for a betrothed girl before her marriage (Deuteronomy 22:23f), and the woman before them was married. They cared nothing for the law and were only interested in cooking up some charge against Jesus. Incidentally, if they had really believed their own earlier indictment of him as a sabbath-breaker, they would not still have been searching at this later date for another basis of accusation.

Trying him ... has the force of "tempting him." What did they hope to gain? (1) If Jesus had concurred in asking a death penalty for the woman, they would have hailed him before the Romans who had made it illegal for the Jews to assess such a penalty. (2) If the Lord had recommended mercy, they would have placed him at variance with Moses and made a lawbreaker out of him!

Stooped ... and wrote ... on the ground ... The Saviour reacted to such a grotesque and embarrassing situation with silence and by stooping and writing on the ground. This is the only instance of Jesus writing; and the fact of his writing being quickly trampled under foot strongly suggests the only other instance of deity's writing, namely, that of God's inscribing the tables of stone. The decalogue too was quickly trampled under foot (spiritually), and Moses smashed the tables of stone (Exodus 32:19). If this passage is really spurious, it is difficult to explain such overtones as this.