Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Satan sets his designs on one or two men, but when they are three, he does not set his designs on them."
Al-Bazzar recorded it. Its chain contains Abd al-Rahman bin Abi al-Zinad, who is da'if (weak), though he has been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5309