Muhammad Husayn Haykal says that the (fatal) sickness of the Prophet began on the morning following the night on which he had visited the cemetery, i.e., on 20th of Safar.
हामप् दिनमा भन्दा पनि रातमा पढ्ने बानी बसाएमा हामीले पढेको कुरा हामीलाई छिट्टै याद हुन्छ ।