Adam Clarke on Isaiah 49:5

And now, saith the Lord "And now, thus saith Jehovah" - The word כה coh, before אמר amar, is dropped out of the text: it is supplied by eight MSS. (two ancient) of Dr. Kennicott's, two of De Rossi's, and the Septuagint, Syriac, and Vulgate.

Though Israel be not gathered "And that Israel unto him might be gathered" - Five MSS. (two ancient) confirm the Keri, or marginal correction of the Masoretes, לו lo, unto him, instead of לא lo, not, in the text; and so read Aquila; and the Chaldee, Septuagint, and Arabic omit the negative. But the Septuagint, MSS. Pachom, and 1. D. 2 express also the Keri לו lo by προς αυτον, to him.