But if they turn away, [O Muhammad] - then only upon you (16:82)

﴿فَإِن تَوَلَّوْا فَإِنَّمَا عَلَيْكَ الْبَلَاغُ الْمُبِينُ﴾
[ النحل: 82]

16:82 But if they turn away, [O Muhammad] - then only upon you is [responsibility for] clear notification.

If they turn away from faith and acceptance of what you have brought, then your duty, O Messenger, is only to convey what you have been instructed to in a clear manner.
It is not your duty to make them accept guidance.

Then, if they turn away, your duty (O Muhammad SAW) is only to convey (the Message) in a clear way.

phonetic Transliteration

Fain tawallaw fainnama AAalayka albalaghu almubeenu

Abdullah Yusuf Ali - Translation

But if they turn away, thy duty is only to preach the clear Message.

Safi-ur-Rahman al-Mubarakpuri

Then, if they turn away, your duty (O Muhammad) is only to convey (the Message) in a clear way.

Page 276 English transliteration