Fill the 3. Pour it into the 5. then Fill the 3 again. Pour 2 into the 5. 1 remains in the 3. then empty the 5. Pour the 1 from the 3 into the 5. then Fill the 3 again. Pour it into the 5 that already has 1 in it.
You fill the five leter bowl. Then fill the 3 from the 5. Then you have 2 in the 5. Empty the 3 leter bowl. And pour the 2 leters from the 5 in the 3. Fill the 5 again and carefully pour into the 3 leter bowl that already has 2 in it. Then you will be left with 4 leters in the 5 leter bowl