“Oh sheik osama my father, my brother/My love for you is like no other / Oh Sheik Osama now that you are gone / The muslims must wake up they must be strong,” it begins.
Bin Laden was killed by US troops in 2011 in Pakistan.
It continues: “al Qaeda are stronger and fiercer than ever / Thinking in the end you are stupid it will NEVER / Be over until the day that we see our lands returned and governed by He Allah the almighty,/ Whose law is complete.
“So make your plans and He is the best of planners./ Their was no victory for you Mr (US President Barack) Obama / The honour is his on martyred Osama!!!!!!!!!!!!!!!!”
Lewthwaite is the widow of Germaine Lindsay, one of four Islamist suicide bombers who attacked the London transport network on July 7, 2005, killing 52 innocent people.
The 29-year-old Muslim convert is the subject of an Interpol “red notice” warrant for her detention, issued at Kenya’s request after Islamist gunmen massacred at least 67 people at a Nairobi shopping mall last month.
Investigators also found a flash drive believed to belong to Lewthwaite which showed how she spent eight years researching bomb making, Sky News said.