AKHIR- I -CHAHAR – I – SHAMBAM اخر چهار شمبم
The last Wednesday of the month of Safar. It is observed as a feast in commemoration of Muhammad’s having experienced some mitigation of his last illness, and having bathed. It was the last time he performed the legal bathing, for he died on the twelfth day of the next month. In some parts of Islam it is customary, in the early morning of this day to write verses of the Qur’an known as the Seven Solams (q.v.), and then wash off the ink and drink it as a charm against evil. It is not observed by the Wahhabis nor is its observance universal in Islam.
Based on Hughes, Dictionary of Islam