Woke up late for fajr in masjid, but no one was at home to pray with. Mosque where there might be a second congregation is 5 min away by foot. Is it obligatory to go outside and pray or can I pray alone at home when very tired?

Ustadh AbdulAziz al-Haqqan

2 sayings for the people of ilm, 1 party says it is mandatory, another says it is favored.