וַתָּבֹ֞א אֶל־אִ֤ישׁ הָֽאֱלֹהִים֙ אֶל־הָהָ֔ר וַֽתַּחֲזֵ֖ק בְּרַגְלָ֑יו וַיִּגַּ֨שׁ גֵּֽיחֲזִ֜י לְהָדְפָ֗הּ וַיֹּאמֶר֩ אִ֨ישׁ הָאֱלֹהִ֤ים הַרְפֵּֽה־לָהּ֙ כִּֽי־נַפְשָׁ֣הּ מָֽרָה־לָ֔הּ וַֽיהוָה֙ הֶעְלִ֣ים מִמֶּ֔נִּי וְלֹ֥א הִגִּ֖יד לִֽי׃
And when she came to the man of God to the hill, she caught hold of his feet. And Gehazi came near to thrust her away; but the man of God said: ‘Let her alone; for her soul is bitter within her; and the LORD hath hid it from me, and hath not told Me.’
Ibn Ezra
2. And the remaining camp can remain - perhaps it will be the case that they will run away. Or that his brother's anger will abate with his attack on the first camp, or reprieve and rescue will come from God and similarly “If the Arameans prove too strong for me, you come to my aid" (II Samuel 10:11).
Rashi
לא ירפך means, He will not let loose of thee so as not to hold thee fast by His hands. The expression לא ירפך is an expression signifying: He will not cause something (our Hiphil) — He will not give thee any looseness, i.e. He will not separate you from Him. Similar is (Song 3:4) “I hold him fast, and I will not let him loose (אַרְפֶּנוּ )”, which is not vowelled אֶרְפֶּנוּ (which is Kal and an impossible form of the root רפה “to be loose”). Always the expression “letting slack (רפה)” in the Hiphil refers to one who causes looseness to others or to one who causes it to himself. For example (2 Kings 4:2) הרפה לה means, “give her looseness”; (Deuteronomy 9:14) הרף ממני means, “Give looseness to thyself from off me”.