Do not grieve over them (because of their negative response toward your mission), nor be distressed because of all that they scheme (to void your mission and bar people from God’s way)
And, (O Esteemed Beloved,) do not grieve (over what they say), nor (undergo) distress at the deceitful and treacherous activities which they are carrying out
Do not grieve over them... And do not feel distressed by their schemes!
Sayyed Abbas Sadr-Ameli
And do not grieve for them nor be you straitened for what they devise
Al-muntakhab fi tafsir al-Qur'an al-Karim
And do not be grieved at heart for their denial of the divine message nor for their hearts which dare rise defiant against Allah, nor should you be sorely distressed on account of their cunning which they take for a sinister and crooked wisdom