Add whole wheat flour, salt, baking soda and oil in the same bowl in which yeast is activated.
Mix everything well without adding water.
Add water slowly and start kneading the dough. Initially it will be a sticky dough. Roughly used between 1.25 to 1.50 cup of water in kneading a dough.
Grease your hands and knead the dough very well for about 10 -12 minutes.
Grease the bowl with oil and put dough in it.
Grease the dough too.
Cover the bowl with a cling film and place the bowl in a warm area in the kitchen.
Let the bowl remain there for atleast 2 hour or until the dough gets doubled.
Once the dough is doubled, knead once again for about 5 minutes and make it into a smooth dough.
Take a loaf pan and grease it with oil.
Give a cylindrical shape to the dough & place it in the pan.
Brush some oil on top of the dough and again cover it with cling film.
Again keep this aside for about 45 minutes to an hour. Its going to rise again.
Once it is risen, brush the top of the dough with milk generously.
Place the pan in preheated oven at 180°C for 30 minutes or until the top gets brown.
Remove the pan from the oven and immediately rub butter on the surface. It will give a nice glaze to your bread.
Run a knife on all the sides of pan so that bread comes out easily.
Demould the bread while it is still hot.
Keep aside for cooling.
Cut it into slices only when the bread is completely cool. Enjoy.