وَاِعلَمَنand know عِلماًknowledge يَقيناًcertain أَنَّهُthat it is the case
وَاِعلَمَن عِلماً يَقيناً أَنَّهُ
لَيسَis not يُرجىhoped for لَكَfor you مَنone who لَيسَis not مَعَكwith you
لَيسَ يُرجى لَكَ مَن لَيسَ مَعَك
And know with certainty that
you can place no hope in one who is not with you.