These two readings are forms IV and I of the same verb, with the same meaning, ascribed to God with the first-person majestic plural.

The form I verb is here ascribed to the cattle etc. which produce the milk by God's will. Masculine and feminine pronouns can be alternated for this kind of plural.

Abū Jaʿfar al-Madanī

Ibn ʿĀmir al-Shāmī

Nāfiʿ al-Madanī

Ḥamzah al-Zayyāt

Ibn Kathīr al-Makkī

Khalaf al-Bazzār

Abū ʿAmr al-Baṣrī

al-Kisāʾī

Yaʿqūb al-Ḥaḍramī

ʿĀṣim al-Kūfī

Ibn Wardan

Ibn Jammaz

Hishām

Ibn Dhakwān

Warsh

Qalun

Khalaf

Khallad

Al-Bazzi

Qunbul

Isḥaq

Idrīs

Ad-Duri

As-Susi

Abu al-Harith

Ruwais

Rawḥ

Shuʿbah

Ḥafṣ

وَإِنَّ لَكُمْ فِى ٱلْأَنْعَـٰمِ لَعِبْرَةً ۖ نُّسْقِيكُم مِّمَّا فِى بُطُونِهِۦ مِنۢ بَيْنِ فَرْثٍ وَدَمٍ لَّبَنًا خَالِصًا سَآئِغًا لِّلشَّـٰرِبِينَ