The Quran

Preface

وَاستَفزِز مَنِ استَطَعتَ مِنهُم بِصَوتِكَ وَأَجلِب عَلَيهِم بِخَيلِكَ وَرَجِلِكَ وَشارِكهُم فِي الأَموالِ وَالأَولادِ وَعِدهُم ۚ وَما يَعِدُهُمُ الشَّيطانُ إِلّا غُرورًا

Yusuf Ali

“Lead to destruction those whom thou canst among them,¹ with thy (seductive) voice;² make assaults on them³ with thy cavalry and thy infantry; mutually share with them wealth and children;⁴ and make promises to them.” But Satan promises them nothing but deceit.⁵

“Do thy worst; but ye are both warned that that path leads to destruction.”
Evil has many snares for mankind. The one that is put in the foreground is the voice-the seductive personal appeal, that “makes the worse appear the better part.”
The forcible assault of Evil is next mentioned under the metaphor of cavalry and infantry. It is when cajolery and tempting fair-seeming seem to fail that an attack is made in force with weapons of violence of all kinds, like the different arms in an organised army
If the first assaults are resisted, Evil has other weapons in its armoury.
Tangible fruits are dangled before the eyes, ill-gotten gains and children of sin, that follow from certain very alluring methods of indulgence in passion. Or it may be children dedicated to sin or worldly gains, etc. And then there are all kinds of promises for the future.
This is a parenthetical clause inserted to show up what the promises of the Evil One are worth.