Abdur Rahman ibn Abu Layla said that Sayyidina Zayd ibn Arqam (RA) called four takbirs in their funeral prayers. But, once he called five takbirs. So, they asked him about it and he said, “Allah’s Messenger used to do like that.”
[Muslim 957, Abu Dawud 3197, Nisai 1978, Ibn e Majah 1505]
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