1.....(3.4)
...my foes are so many!
According to Rabbi Judah son of Khanina, God said to David, You did commit adultery once, sixteen women in your family will suffer rape. You did murder once, sixteen of your kindred will be murdered.
2.....(3.4)
Abundant ones are rising upon me.
Great of stature, and great in learning.
Great in stature was Shobach, he was called shobach because he stood as high as a dovecote, he was also called Shophach, because he shed blood. Of such stature were also Goliath, of who it is said, His height was six cubits and a span (Shmuel I - I Samuel 17:4), and Saul of who it is said, From his shoulders and upwards he was higher than any of the people (Shmuel I - I Samuel 9:2).
Great in learning where Doeg and Ahithophel.
Doeg was a chief of the high court, for it is said, Doeg the Edomite, the chief of Saul's shepherds. (Shmuel I - I Samuel 21:8)
And as to Ahithophel, it is written, And the counsel of Ahithophel, which he counselled in those days was as if a man inquired of the word of God.(Shmuel II - II Samuel 16:23).