Lahna ji (Guru Angad Dev ji ) Meets Guru nanak

As told earlier, Lahna Ji was an ardent follower of Vaishno Devi. Every year He lead a group of followers to Devi's temple. In 1589 Bikrami, the group started its journey and made its first stop at Kartarpur, where Guru Nanak was staying. Lahna Ji had a burning desire to meet the creator, whose divine hymns had enchanted him for such a long time. As he slept that night, he had a strange dream. He saw that Vaishno Devi was sweeping the floor of Guru Nanak. When he asked Devi the reason for doing so She replied, "The source of all my powers is Guru Nanak. All that I distribute among my followers is a prize of sweeping His floors." The dream had an imposing effect. Lahna Ji thought that if Nanak is the ultimate giver, and even the Devis bow to Him, He should be his real Guru. So he urged his group to continue their journey without him. The group made him repeated requests to accompany them, but Lahna Ji had made up his mind to spend the rest of his life serving Guru Nanak.
Lahna Ji's Tests of Patience and Devotion
Lahna Ji started spending all of his time in serving Guru Nanak or reciting His hymns. He was completely dedicated to divine service. Guru Nanak was to reward him for all this but not without a series of twelve tests.
In the first test Nanak ordered several of His Sikhs, including Lahna Ji, to fetch fresh grass for the cattle during a heavy downpour. While all others cut corners Lahna Ji abided by Guru Nanak's words, and brought back a bundle of green grass on his head with water oozing out to spoil his clothes. Guru Nanak laughed, but out of joy of Lahna Ji passing his first test. On another rainy day Guru Nanak went for a bath in the river, accompanied by five of His sikhs Baba Buddha, Bhagirath, Saadaaran, Ajita and Lahna Ji. While Guru Nanak took a dip in the river, He asked His men to stay on the banks. A chilling breeze of air and rain storm made everyone but Lahna Ji leave the place. Lahna Ji had successfully completed the second one.
The third one was very bizarre. As Guru Nanak was crossing a forest with His Sikhs and His own sons they came across a dead body. Guru Nanak ordered all of them to eat the body. Everyone was apprehensive and none had the courage to come forward and taste blood. Lahna Ji had tremendous faith in Guru Nanak, and without a hitch he proceeded to lift the cloth of sheet over the body. To everybody's bewilderment there was 'Karah Parshad' (holy food) underneath. Lahna Ji enjoyed the meal and all others were left ashamed.
One night while it was raining cats and dogs a wall fell. Guru Nanak ordered His Sikhs to wake up and reconstruct the wall. Some did not bother to even leave their bed as they believed that it was impossible to construct the wall in such severe rain; but as soon as Guru Nanak directed Lahna Ji to do the task he started off in a flash and spent rest of the night in erecting the wall.
Sangat (religious gathering) had conglomerated and Guru Nanak intentionally did not have 'Karah Parshad' to be distributed among them. He asked his own sons to shake an acacia tree and remove 'Parshad' from it, but they found it absurd and refused to proceed. It was again Lahna, the one with absolute faith in Guru Nanak's utterances, who shook the acacia, and 'Parshad' did fall to leave everyone astonished.
Guru Nanak once called on every one in the middle of the night and asked them to wash clothes on the river bank. Sri Chand and Lakhmi Das, Guru Nanak's own sons, found it below their dignity to wash the clothes themselves. While most of the other Sikhs made excuse of the dead of the night, Lahna Ji unphased by any outside uncomfortable conditions, went to the river and came back with washed clothes.

Guru Nanak once took the form of a gigantic monster with deep red eyes, a huge knife tied to His waist, and started behaving in a strange scary manner. He set off for the forests, the Sikhs followed Him to some distance but everybody gave up, feeling too scared. But Lahna matched Guru Nanak step to step. He tried all sorts of tricks to scare Lahna Ji but could not shake his faith.