وَجَعَلَ يُوَدِّعُ مَنْ يُشَيِّعُهُ، لِيَخْفَى عَلَيْهِ مَهْيَعُهُ
He kept bidding farewell to those escorting him so that his route would remain hidden from them.
Yushayyiʿuhu refers to accompanying someone on departure; mahyaʿ is an open or broad road; li-yakhfā introduces the purpose for keeping that road concealed.
He observes outward courtesy while refusing to reveal his path. The purpose clause makes this deliberate behavior, rather than a mere accidental parting.