The summer signing from Aston Villa has been handed the shirt number worn by several of Liverpool's legendary forwards in the past.
Lambert is currently having a medical at West Bromwich Albion, according to Sky Sports, meaning the Belgian will be free to take the number.
It is likely to bring a lot more pressure on Benteke, who became the club's second most expensive player following his £32.5 million move from Aston Villa.
The number is synonymous with many prolific goalscorers to have pulled on the Red shirt, including Ian St John, Ian Rush, Robbie Fowler and most recently Fernando Torres - though after Torres's departure, the players, including Lambert, to have been handed the shirt are Andy Carroll and Iago Aspas.
Benteke will be hoping to join the select group that features the likes of Rush and Fowler rather than Carroll and Aspas as he is seen to be the man to provide the Reds with goals on a regular basis - as their attack was pretty blunt for the majority of last season.
He could make his first appearance in a Liverpool shirt this weekend as the Reds play two friendlies - one in Helsinki and the other against Swindon Town - as they prepare for their Premier League opener against Stoke City at the Britannia Stadium in nine days time.