Mishkat al-Masabih 20 Game and Animals Which May Be Slaughtered كتاب الصيد والذبائح 69

وَعَن سلمَان قَالَ: سُئِلَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ الْجَرَادِ فَقَالَ: «أَكْثَرُ جُنُودِ اللَّهِ لَا آكُلُهُ وَلَا أُحَرِّمُهُ» . رَوَاهُ أَبُو دَاوُدُ وَقَالَ محيي السّنة: ضَعِيف

Salman said the Prophet was asked about locusts and replied, “They are the most numerous of God’s hosts. I neither eat them nor declare them unlawful.” Abu Dawud transmitted it, but Muhyi as-Sunna said it is weak.