It is narrated from Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever relieves a believer of a hardship, Allah will relieve him of a hardship on the Day of Resurrection; whoever conceals a believer's faults, Allah will conceal his faults; and whoever eases a difficulty for a believer, Allah will ease a difficulty for him."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16399
Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) ordered me to shave my head and give a sheep as ransom.
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16400
Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) said: When the lice troubled me, the Prophet (peace and blessings be upon him) ordered me to shave my head, then fast three days or feed six poor people, and he (peace and blessings be upon him) knew that I had nothing to slaughter.
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16401