Complex sentence: When Amir-ul-Mashaiq grew up he accepted the bait (oath) on the hand of his paternal uncle Shah Hesamuddin Chishti and Hazrat awarded him the Khilafat and told him You are already a murid and have the khilfat from your father.
Split into simpler sentences: When Amir-ul-Mashaiq grew up he accepted the oath, on the hand of his paternal uncle, Shah Hesamuddin Chishti and was awarded the Khilafat. He was also told that You are already a murid and have the khilfat from your father.