Ash-Shu'ara' - 26:132

وَاتَّقُوا الَّذِي أَمَدَّكُم بِمَا تَعْلَمُونَ
[26:132]
And be careful of (your duty to) Him Who has given you abundance of what you know.
"Yea, fear Him Who has bestowed on you freely all that ye know.
Keep your duty toward Him Who hath aided you with (the good things) that ye know,