This is authentic to my knowledge.

is it authentic ?The Prophet (sal Allahu alaihi wa sallam) said: “When Allah drowned Firaun, he said (while drowning), ‘I believe that there is no God but He in whom the Children of Israil believe.’ Jibreel said to me, ‘O Muhammad! If you could have seen me when I took the mud from the sea and shoved it into his mouth, fearing that the mercy of Allah might save him” -Trimidhi