Meaning of “śrīguru caran saroj raj nij manu mukuru sudhāri”
"śrīguru caran saroj raj nij manu mukuru sudhāri" is Doha 1 of the Hanuman Chalisa, which Tulsidas wrote in Awadhi. It means: With the dust of my guru's lotus feet I polish the mirror of my mind. Then I sing the spotless glory of Rama, best of the Raghus, which gives all four fruits of life: dharma, wealth, fulfilment and freedom.
श्रीगुरु चरन सरोज रज निज मनु मुकुरु सुधारि ।बरनउँ रघुबर बिमल जसु जो दायकु फल चारि ॥śrīguru caran saroj raj nij manu mukuru sudhāribaranauṁ raghubar bimal jasu jo dāyaku phal cāri
With the dust of my guru's lotus feet I polish the mirror of my mind. Then I sing the spotless glory of Rama, best of the Raghus, which gives all four fruits of life: dharma, wealth, fulfilment and freedom.
Tulsidas opens the Ayodhya Kand of his Ramcharitmanas with this same couplet, word for word, as the story turns to the plan to crown Rama.
श्री गुरु चरन सरोज रज निज मनु मुकुरु सुधारि। बरनउँ रघुबर बिमल जसु जो दायकु फल चारि॥
Ramcharitmanas, Ayodhya Kand 2.1, doha 1
Other readings
Rambhadracharya's Mahaviri prints निज मन मुकुर ... जस ... दायक, without the final u. The u endings are Awadhi and are what the Gita Press prints.
The same thought in the Gita
Krishna tells Arjuna to learn from those who know by bowing to them, asking, and serving them. The Chalisa starts in the same place, at the guru's feet. Read Bhagavad Gita 4.34
Awadhi text: Goswami Tulsidas, Gita Press reading, checked against three Gita Press printings and Rambhadracharya's Mahaviri. English meaning and word glosses: Wisdom's own, following the traditional reading, edited by Ankur Shukla.