Midrasz do Samuela II 10:1

(Gen. 20:1:) THEN ABRAHAM JOURNEYED FROM THERE. It is written (in Prov. 27:10): < DO NOT FORSAKE > YOUR FRIEND AND YOUR FATHER'S FRIEND … < A CLOSE NEIGHBOR IS BETTER THAN A DISTANT BROTHER >. This < verse refers to > Hanun ben Nahash, king of the children of Ammon, as mentioned (in II Sam. 10:1f.): AND IT CAME TO PASS AFTER THAT THAT {NAHASH} THE KING OF THE CHILDREN OF AMMON, DIED; < AND HIS SON HANUN REIGNED IN HIS STEAD. > THEN DAVID SAID: I WILL DEAL FAITHFULLY WITH HANUN BEN NAHASH. R. Berekhyah said in the name of R. Eleazar ben Pedat: And how did Nahash deal faithfully with David, since he had said (ibid., cont.), AS HIS FATHER DEALT FAITHFULLY WITH ME? Simply < like this >: When David fled from Saul, David and all his father's house went to Moab. He said to them: Receive my father, as stated (in I Sam. 22:4): SO HE BROUGHT < HIS PARENTS > BEFORE THE KING OF MOAB. (I Sam. 22:3:) AND HE SAID [UNTO THE KING OF MOAB]: PLEASE LET MY FATHER AND MY MOTHER {DWELL} [GO AWAY] < WITH YOU >. So he received them. When David went away, the king of Moab arose and killed the father, mother, and brothers of David. Only one of them survived, as < only one > is mentioned < in David's census > (in I Chron. 27:18): BELONGING TO JUDAH < THERE WAS > ELIHU, ONE OF DAVID'S BROTHERS. R.Levi bar Halafta the Priest said that only one of them survived. And how was Elihu saved? He simply fled from the king of Moab and came to Nahash, king of Ammon, who received him. The king of Moab sent and said to Nahash: Did, perhaps, one of David's brothers come to you? He said to him: No; and he kept him until David came. For that reason David said (in II Sam. 10:2): I WILL DEAL FAITHFULLY WITH HANUN BEN NAHASH. When David's representatives⁹⁹The word here is sheluah, the Hebrew equivalent of “apostle.” came to Hanun, the princes of the children of Ammon said to him (in I Sam. 10:3): What is this? DO YOU THINK THAT DAVID IS HONORING YOUR FATHER < JUST > BECAUSE DAVID SENT COMFORTERS TO YOU? Do not trust David. Why? Because the Holy One has warned him about us. It is written {for him} in his Law (in Deut. 23:4): NO AMMONITE OR MOABITE SHALL COME INTO THE ASSEMBLY OF THE LORD. It is also written (in Deut. 23:7): YOU SHALL NOT SEEK THEIR WELFARE AND BENEFIT. Thus the Holy One has warned him. So will he despise the words of his God, and say (in II Sam. 10:2): I WILL DEAL FAITHFULLY WITH HANUN BEN NAHASH? (Ibid., vs. 3:) IS IT NOT IN ORDER TO INVESTIGATE THE CITY? Immediately (in vs. 4) HANUN TOOK THE SERVANTS OF DAVID AND SHAVED OFF < HALF OF THEIR BEARDS >…. The Holy Spirit cries out (in Prov. 27:10): < DO NOT FORSAKE > YOUR FRIEND AND YOUR FATHER'S FRIEND…. And so it was with Jehoram ben Jehoshaphat. When he became king, he killed all his brothers, as stated (in II Chron. 21:4): WHEN JEHORAM HAD RISEN UP OVER THE KINGDOM OF HIS FATHER, HE CONSOLIDATED HIS POWER AND KILLED ALL HIS BROTHERS {AND HIS FATHER'S HOUSE}.