King James Version (KJV)
And when Joab was come out from David, he sent messengers after Abner, which brought him again from the well of Sirah: but David knew {it} not.
Modern English
When Joab had come out from David, he sent messengers after Abner, and they brought him back from the well of Sirah; but David didn’t know it.
Hebrew
וַיֵּצֵ֤א יוֹאָב֙ מֵעִ֣ם דָּוִ֔ד וַיִּשְׁלַ֤ח מַלְאָכִים֙ אַחֲרֵ֣י אַבְנֵ֔ר וַיָּשִׁ֥בוּ אֹת֖וֹ מִבּ֣וֹר הַסִּרָ֑ה וְדָוִ֖ד לֹ֥א יָדָֽע׃
vayeṣeʾ yvoʾab meʿim david vayishlaḥ malʾakiym ʾaḥarey ʾabner vayashibv ʾotvo mibvor hasirah vdavid loʾ yadaʿ