According to another narration, when Hazrat Abu Bakr (radhiyallahu ‘anhu) noticed Ummu Jameel (the wife of Abu Lahab) coming towards them (to attack Rasulullah (sallallahu ‘alaihi wasallam) after Surah Lahab was revealed), he cautioned Rasulullah (sallallahu ‘alaihi wasallam) saying, “O Prophet of Allah (sallallahu ‘alaihi wasallam)! Ummu Jameel is approaching us from the front! I fear for your safety!” Rasulullah (sallallahu ‘alaihi wasallam) replied:
إنها لن تراني
She will never see me.
Rasulullah (sallallahu ‘alaihi wasallam) then recited a few verses of the Qur’aan Majeed.
The narration of Musnad Bazzaar reported by Hazrat Ibnu ‘Abbaas (radhiyallahu ‘anhuma) mentions that Ummu Jameel came up to Hazrat Abu Bakr (radhiyallahu ‘anhu) and said, “This man insults me through poetry (referring to Surah Lahab that was revealed explaining the punishment that she and her husband will receive in Jahannum due to their actions).” Hazrat Abu Bakr (radhiyallahu ‘anhu) replied, “By the Lord of the Ka’bah! What he speaks is not poetry.” Ummu Jameel retorted in rage, “You are a man who believes all that he says.”
Saying this, she walked away. Hazrat Abu Bakr (radhiyallahu ‘anhu) then said, “O Prophet of Allah (sallallahu ‘alaihi wasallam)! It seems that Ummu Jameel did not see you.” Rasulullah (sallallahu ‘alaihi wasallam) replied, “Until she left, an angel continued to conceal me from her.”
(Extracted from Seeratul Mustafa 1/213)