Bumrah creates another opportunity as Labuschange is beaten as he pokes away from his body.
The right-hander then guides a low full toss on the bounce over the slips for two runs and clips the last ball for two more runs.
In the next over, Smith quick to pounce on the error from Jadeja as he pulls the short ball over midwicket for a four. Jadeja clearly upset with Siraj's fielding effort after he put in the dive but couldn't get close to the ball.
Australia are 165/2 in 50 overs as they continue to bat steadily in the second session.
Labuschagne pulls Bumrah for a single to fine leg after the pacer had overstepped off the previous delivery.
Bumrah tries the slower ball clocked 120kph which dips shortly but Labuschagne adjusts quite well to block it.