Go in peace. God's servants are not "directors of conscience", but ministers of His Word. To have sanctioned it would have recognized idolatry. To have forbidden it would have put Naaman under. yoke to Elisha. It was for Naaman to decide whether he could do this thing, and be at "peace".
a little way.. phrase found only here and Genesis 35:16 with Genesis 48:7. =. stone's throw.