SEV Biblia, Chapter 20:4
¶ Y el rey dijo a Amasa: Júntame los varones de Judá para el tercer día, y hállate tú aquí presente.
Clarke's Bible Commentary - 2 Samuel 20:4
Verse 4. Then said the king to Amasa] Thus he invests him with the command of the army, and sends him to collect the men of Judah, and to come back to receive his orders in relation to Sheba, in three days. It appears that Amasa found more difficulty in collecting his country-men than was at first supposed; and this detaining him beyond the three days, David, fearing that Sheba's rebellion would get head, sent Abishai, who it appears was accompanied by Joab, to pursue after Sheba. Amasa, it seems, got up with them at Gibeon, ver. 8, where he was treacherously murdered by the execrable Joab.
John Gill's Bible Commentary
Ver. 4. Then said the king to Amasa , etc.] Whom he had promised to make general of his army, ( 2 Samuel 19:13); and by the following order declared him such: assemble me the men of Judah within three days ; which was done by the sound of the trumpet, or by the proclamation of a herald; it seems that the men of Judah, who attended David to Jerusalem, were gone to their respective cities and places of abode, or there would have been no occasion for such a summons; though it is strange they should, when the men of Israel appeared so inclinable to a new rebellion: and be thou here present ; to take the command of them.
Matthew Henry Commentary
Verses 4-13 - Joab barbarously murdered Amasa. The more plot there is in a sin, the worse it is. Joab contentedly sacrificed the interest both of the kin and the kingdom to his personal revenge. But one would wonder with what face a murderer could pursue a traitor; and how, under such a load of guilt, he had courage to enter upon danger: his conscience was seared.
Original Hebrew
ויאמר 559 המלך 4428 אל 413 עמשׂא 6021 הזעק 2199 לי את 853 אישׁ 376 יהודה 3063 שׁלשׁת 7969 ימים 3117 ואתה 859 פה 6311 עמד׃ 5975