Giving
“charity” to a person by praying with him after Fajr
Question

                A man prayed Fajr in
      jamaa’ah, then another man came late and asked the first man to pray with him as a
      naafil prayer so that he could earn the reward for praying in jamaa’ah. What is the
      ruling on that?
Praise be to Allah.If a man comes in after Fajr or ‘Asr, and he has missed the
    (congregational) prayer, there is nothing wrong with another man praying with him and
    giving him “charity” in this way. The rule is that every naafil prayer that is
    done for a specific reason may be done at a time when naafil prayers are otherwise not
    allowed, such as Tahiyyat al-masjid (greeting the mosque), sujood al-tilaawah (prostration
    when reciting Qur’aan) and Salaat al-Istikhaarah when the matter is urgent and a
    decision must be reached before the end of the time when naafil prayer is not allowed,
    giving “charity” to someone who comes in after ‘Asr or Fajr, and similar
    cases.