Bumrah, who conceded 21 runs in two overs, will bowl his third over in the Powerplay.
Ayub gets a single first ball before Farhan pulls the next powerfully through midwicket for a four.
He smashes the third ball straight back as Bumrah manages to stop it on his follow through before he mistimes the pull shot for a single.
Bumrah bowls a full toss as Ayub drives the full delivery straight down the ground for three runs to mid-off.
Farhan continues the assault on Bumrah as he hammers the last ball over mid-off for a four.
Bumrah goes for 13 in his third over as Pakistan race to 55/1 in six overs.
Farhan has smashed 29 from 21 balls to help Pakistan bounce back after the early wicket.