It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "O Allah! Forgive those who shave their heads." A man said: "Pray also for those who shorten their hair." The Prophet (peace and blessings be upon him) on the third or fourth time said for those who shorten their hair: "O Allah! Forgive those who shorten their hair as well."
Hadith Referenceمسند احمد / ومن مسند بني هاشم / 1859
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف لضعف يزيد بن أبى زياد.